Document:

Exhibit 4(a)

                          HANGER ORTHOPEDIC GROUP, INC.
                      Non-Qualified Stock Option Agreement

         THIS AGREEMENT is made as of December 12, 2001, by and between HANGER
ORTHOPEDIC GROUP, INC., a Delaware corporation (the "Company"), and Jay Alix &
Associates, Inc. (the "Optionee").

                              W I T N E S S E T H:
                               -------------------

         WHEREAS, the Company desires to grant to the Optionee a non-qualified
stock option to purchase One Million Two Hundred Two Thousand Four Hundred
Thirty-Six (1,202,436) shares of the Company's common stock, par value $.01 per
share (the "Common Stock"), in consideration for services rendered to the
Company by the Optionee pursuant to the terms of the letter agreement, dated
January 23, 2001 (the "Letter Agreement"), between the Company and the Optionee.

         NOW, THEREFORE, the parties hereto, intending to be legally bound, do
agree as follows:

         1. Grant of Option. Subject to the terms and conditions of this
Agreement, the Company hereby grants to Optionee the right and option to
purchase from the Company all or part of an aggregate of One Million Two Hundred
Two Thousand Four Hundred Thirty-Six (1,202,436) shares of Common Stock. This
option is not intended to qualify as an incentive stock option within the
meaning of Section 422A of the Internal Revenue Code of 1986, as amended.

         2. Option Price and Time of Exercise. The per-share purchase price at
which the shares subject to option hereunder may be purchased by Optionee
pursuant to its exercise of this option shall be $1.40, which price equals the
average closing price per share of the Common Stock on the New York Stock
Exchange for all trading days during the period from December 23, 2000 through
January 23, 2001, as required under the terms of the Letter Agreement. The
Optionee's right to exercise this option shall not vest until June 18, 2002,
from and after which time the Optionee may exercise this option in whole or in
part at any time prior to the expiration of this option on May 31, 2007 (the
"Option Period"). The right to exercise this option shall be cumulative to the
extent not theretofore exercised.

         3. Method of Exercise and Payment for Shares. This option shall be
exercised by written notice from the Optionee and delivered to the Company at
its principal office, specifying the number of shares to be acquired upon such
exercise and delivering therewith by wire transfer of funds or a certified check
in an amount equal to the exercise price of the option multiplied by the number
of shares of Common Stock to be acquired upon such exercise of the option by the
Optionee.

         4. Non-transferability of Option; Restricted Securities. This option is
not transferable by Optionee, except only after the written consent of the
Company, which shall not

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be unreasonably withheld, in connection with a merger of the Optionee or the
transfer by the Optionee of all or substantially all of its assets (including
this option), in which event this option may be transferred by the Optionee to
such successor after the issuance of the written consent of the Company. The
shares of Common Stock acquired by Optionee upon any exercise of this option
shall be "restricted securities" within the meaning of Rule 144(a)(3) under the
Securities Act of 1933 and Optionee shall be required to comply with and satisfy
all applicable laws in any resale transactions conducted by Optionee which
involve any such shares of Common Stock so acquired by Optionee under this
option.

         5. Merger, Consolidation, Acceleration of Option Vesting.

         (a) Effect of Transaction. Upon the occurrence of any of the following
events, if the notice required by Section 5(b) hereof shall have first been
given, the option granted hereunder shall automatically terminate and be of no
further force and effect whatsoever, without the necessity for any additional
notice or other action by the Company: (i) the merger, consolidation or
liquidation of the Company or the acquisition of its assets or stock pursuant to
a nontaxable reorganization, unless the surviving or acquiring corporation, as
the case may be, shall assume all outstanding options of the Company or
substitute new options for them pursuant to Section 425(a) of the Code; (ii) the
dissolution or liquidation of the Company; (iii) the appointment of a receiver
for all or substantially all of the Company's assets or business; (iv) the
appointment of a trustee for the Company after a petition has been filed for the
Company's reorganization under applicable statutes; or (v) the sale, lease or
exchange of all or substantially all of the Company's assets and business.

         (b) Notice of Such Occurrences. At least 30 days' prior written notice
of any event described in Section 6(a) hereof, except the transactions described
in subsections 5(a)(iii) and (iv) as to which no notice shall be required, shall
be given by the Company to the Optionee. If the Optionee is so notified, it may
exercise all or a portion of the entire unexercised portion of this option at
any time before the occurrence of the event requiring the giving of notice,
regardless of whether such event occurs prior to June 18, 2002. Such notice
shall be deemed to have been given when delivered personally to the Optionee or
when mailed to the Optionee by registered or certified mail, postage prepaid, at
the Optionee's last address known to the Company.

         6. Adjustments Upon Certain Events. If the Company shall at any time
increase or decrease the number of its outstanding shares of Common Stock by
means of the payment of a stock dividend, a stock split or subdivision of
shares, a consolidation or combination of shares, or through a reclassification
of the then outstanding shares of Common Stock, then the aggregate number of
shares of Common Stock subject to this Option and the exercise price of this
Option shall be adjusted proportionately.

         7. Binding Effect, Entire Agreement. Subject to the limitations stated
above, this Agreement shall be binding upon and inure to the benefit of the
Optionee (and its successor as provided in Section 4 of this Agreement) and the
Company. This Agreement constitutes the entire agreement between the parties and
cannot be altered, modified, or changed in any way unless made in writing and
signed by the party against whom such alteration, modification, or change is
asserted. This Agreement shall be governed by the laws of the State of Delaware.

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<PAGE>

         IN WITNESS WHEREOF, the Company has caused this Agreement to be signed
by its President and attested by its Secretary, and the Optionee has affixed its
signature hereto.

HANGER ORTHOPEDIC GROUP, INC.

By:/s/ George McHenry
   ---------------------------------
      George McHenry
      Executive Vice President &
         Chief Financial Officer

ACCEPTED BY:

JAY ALIX & ASSOCIATES, INC.

By:/s/ Melvin R. Christiansen
   ---------------------------------
      Melvin R. Christiansen
      Treasurer

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<PAGE>
                                   TERM SHEET

         This Term Sheet is intended to summarize the material provisions under
which each of Hanger Orthopedic Group, Inc. ("Hanger") and Jay Alix &
Associates, Inc., now known as AlixPartners, LLC ("AlixPartners") desire to
amend the terms of (i) the Non-qualified Stock Option Agreement, dated as of
December 12, 2001, between Hanger and AlixPartners (the "Option Agreement") and
(ii) the Letter Agreement, dated January 23, 2001 between AlixPartners and
Hanger (the "Letter Agreement"). In the event each of Hanger and AlixPartners
confirm their agreement with the provisions of this Term Sheet by signing this
Term Sheet in the spaces provided below, then within five (5) business days
after the signing of this Term Sheet by both parties, Hanger will present this
matter to its Board of Directors for its approval. In the event of such Board
approval, Hanger will then cause its counsel to prepare the appropriate
transactional documents for the mutual approval of both Hanger and AlixPartners
in order to formally complete this matter. The material terms of this
transaction are as follows:

         1. The Option Agreement will be amended to reduce the number of shares
of Hanger Common Stock underlying the Option Agreement by one-half (1/2) from
1,202,436 shares to 601,218 shares in consideration for the payment by Hanger to
AlixPartners of $2,392,704.00.

         2. In the event the provisions of this Term Sheet are approved by the
Board of Directors of Hanger, then within fifteen (15) business days after such
approval by the Hanger Board of Directors, Hanger will file a registration
statement with the SEC with respect to the remaining 601,218 shares of Hanger
Common Stock which will underlie the Option Agreement after the amendment
thereof as described in the first paragraph of this Term Sheet and Hanger will
use its best efforts to obtain the effectiveness of that registration statement
with the SEC, with the subsequent sale by AlixPartners of such shares (a) being
subject to a volume limitation of no more than 40,000 shares being sellable by
AlixPartners in any calendar week thereafter until all such shares have been
sold, or (b) constituting a larger block trade on terms which are reasonably
acceptable to Hanger.

         3. The Letter Agreement will be amended to reflect that any success
fees, if earned by AlixPartners, which are paid after the date of this Term
Sheet will only be paid in cash, with the right to receive a portion of any such
success fee in the form of a stock option for any further shares of Hanger
Common Stock being hereafter deleted from the terms of the Letter Agreement.

         By signing this Term Sheet below, each of Hanger and AlixPartners
confirm their agreement with the provisions of this Term Sheet.

HANGER ORTHOPEDIC GROUP, INC.               ALIXPARTNERS, LLC

By:  /s/ Ivan R. Sabel                      By:  /s/ Melvin R. Christiansen
    -------------------------------             -------------------------------
     Name:  Ivan R. Sabel                        Name:  Melvin R. Christiansen
     Title: C.E.O.                               Title: Treasurer

Date:  July 23, 2002                            July 19, 2002EXHIBIT 10.61
                                                                   -------------

   CERTAIN INFORMATION HAS BEEN DELETED FROM THIS EXHIBIT AND FILED SEPARATELY
     WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR
                    CONFIDENTIAL TREATMENT UNDER RULE 24b-2.

                                OPTION AGREEMENT

This Agreement is made as of October 2, 2001 by and among PentaPure
Incorporated, a Minnesota corporation ("PentaPure"), Xxxxxxxxxx, Inc., a
Delaware corporation ("Xxxxxxxxxx"), xxxxxxxxxxxxxxxxxx ("xxxxxxx"),
xxxxxxxxxxxx ("Xxxxxxx") and XXXXXXX ("XXXXXXX") (Xxxxxxx, Xxxxxxx and XXXXXXX
being each a "Stockholder" and collectively the "Stockholders").

                                    Recitals:

         The Stockholders own all of the outstanding capital stock of
Xxxxxxxxxx. PentaPure is entering into a Supply Agreement dated October 2, 2001
with Xxxxxxxxxx (the "Supply Agreement") under which Xxxxxxxxxx will supply to
PentaPure (and PentaPure will purchase) approximately xxxxxxxxxxxx carbon blocks
or more during a xxxx month period. The parties also desire that PentaPure
purchase from Xxxxxxxxxx xxxx newly issued shares of Xxxxxxxxxx common stock for
$xxxxxxxxx, and that Xxxxxxxxxx and the Stockholders grant PentaPure certain
options to purchase Xxxxxxxxxx common stock.

                                   Agreement:

         NOW, THEREFORE, in consideration of the foregoing and the mutual
promises set forth below, the parties agree as follows:

         1. Initial Purchase of 6.8% Interest. Xxxxxxxxxx agrees to issue and
sell to PentaPure, and PentaPure agrees to purchase from Xxxxxxxxxx,
xxxxxxxxxxxxxxxxx shares of Xxxxxxxxxx common stock (the "Common Stock") for a
total purchase price of $xxxxxxx. These xxxx shares (referred to herein as the
"Initial Purchase") shall constitute 6.890% of the then outstanding shares of
Common Stock. The Initial Purchase shall occur as of the date of this Agreement,
and a stock certificate representing the Initial Purchase shall be signed and
delivered to PentaPure at the time this Agreement is executed. PentaPure shall
pay the purchase price for the Initial Purchase in xxxxxx installments of
$xxxxxx each, which shall be paid on the xxth, xxth and xxxth day after
Xxxxxxxxxx has commenced production of the carbon blocks to be delivered to
PentaPure under the Supply Agreement. Xxxxxxxxxx shall give PentaPure written
notice and provide reasonable verification of the date of such commencement.

         2. Repurchase if PentaPure Does Not Exercise First Option. In the event
that PentaPure does not exercise the First Option (as defined below) prior to
its expiration on July 31, 2002, then no later than July 31, 2003 Xxxxxxx and
Xxxxxxx shall repurchase from PentaPure and pay cash for the shares constituting
the Initial Purchase at the same price of $xxxxxxxx per share as was paid by
PentaPure to acquire them. Xxxxxxx and Xxxxxxx shall each be obligated to pay
his pro rata portion of the shares (75% and 25% respectively), provided that if
either Xxxxxxx or Xxxxxxx should default in repurchasing the shares he or it is
obligated to

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<PAGE>

repurchase, the other shall repurchase the shares that should have been
repurchased by the defaulting party. The closing of such repurchase shall be
governed by Section 7 below. Upon completion of such repurchase and payment,
this Option Agreement and the Buy-Sell Agreement shall terminate.

         3. First Option to Purchase Additional xxxx% Interest. Xxxxxxxxxx
hereby grants PentaPure the right and option (the "First Option") to purchase
from Xxxxxxxxxx xxx shares of Xxxxxxxxxx Common Stock, constituting (after
giving effect to the purchase under Section 1 above) xxxx% of the then
outstanding shares of Xxxxxxxxxx Common Stock. Xxxxxxxxxx and the Stockholders
warrant that the exercise of the First Option would result in PentaPure owning a
total of xxx shares constituting a total of xxxxx% of the then outstanding
shares of Xxxxxxxxxx Common Stock. The First Option shall be exercisable by
PentaPure giving written notice to Xxxxxxxxxx at any time not later than
xxxxxxxx (the "xxxxxxxxxxxxxxxxxxx"), at which time the First Option shall
expire. The purchase price for the First Option Shares shall be $xxxxxxx, which
shall be payable in cash at the closing of the First Option exercise.

         4. Second Option. (a) Xxxxxxx, Xxxxxxx and XXXXXXX hereby grant
PentaPure the right and option (the "Second Option") to purchase from them a
total of xxx shares of Xxxxxxxxxx Common Stock, or if there has been any
increase above xxxxx in the number of outstanding shares of Common Stock, that
number of shares of the Company Common Stock which together with the Initial
Shares and the First Option Shares constitutes xx% of the outstanding Common
Stock (such xxx or greater number of shares being referred to herein as the
"Second Option Shares"). xxxx% of the Second Option Shares shall be sold to
PentaPure by Xxxxxxx, xxxx% shall be sold to PentaPure by Xxxxxxx and xx% shall
be sold to PentaPure by XXXXXXX. If one or more of the Stockholders should
default in selling to PentaPure his or its portion of the Second Option Shares,
the others shall sell to PentaPure the shares that should have been sold by the
defaulting Stockholder(s). PentaPure shall be entitled to exercise the Second
Option only if it has exercised the First Option. The Second Option shall be
exercisable by PentaPure giving written notice to Xxxxxxx, Xxxxxxx and XXXXXXX
at any time not later than xxxxxxxxxxxxx (the "xxxxxxxxxxxxxxxxxxxxxxx"), at
which time the Second Option shall expire. The purchase price for the Second
Option Shares shall be a total of $xxxxxxx, which shall be payable in cash at
the closing of the Second Option exercise and allocated among Xxxxxxx, Xxxxxxx
and XXXXXXX in proportion to the number of shares sold by each at that closing.

         (b) The First Option and the Second Option are each included in the
meaning of the term "Option" and are collectively referred to herein as the
"Options." The First Option Shares and Second Option Shares are each included in
the meaning of the term "Option Shares."

         (c) PentaPure agrees that it will not, without the prior written
consent of all of the Stockholders, directly or indirectly acquire or enter into
any agreement to acquire any shares of the Company's capital stock by any means
other than the exercise of the Options provided in this Agreement or the
exercise of rights granted under the Buy-Sell Agreement referred to below.

         5. Escrow; Buy-Sell Agreement. At the time this Agreement is executed,
PentaPure and the Stockholders shall also execute an Escrow Agreement with a
commercial bank or trust company in the form attached hereto as Exhibit 1 (the
"Escrow Agreement") and a Buy-Sell Agreement in the form attached hereto as
Exhibit 2 (the "Buy-Sell Agreement").

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<PAGE>

         6. Repurchase if PentaPure Does Not Exercise Second Option. In the
event that PentaPure exercises the First Option but does not exercise the Second
Option prior to its expiration on xxxxxxxxxxxxx, then on or before July 31, 2003
each Shareholder may repurchase from PentaPure the First Option Shares for the
same purchase price, paid in cash, at which they purchased by PentaPure. The
closing of such repurchase shall be governed by Section 7 below. Upon completion
of such repurchase and payment, this Option Agreement and the Buy-Sell Agreement
shall terminate.

         7. Closing. Unless the parties otherwise agree, each closing of an
Option and purchase of Option Shares pursuant to this Agreement (each an "Option
Closing") shall be completed thirty days after notice of exercise of the Option
is given, at 10:00 AM, Minneapolis time, at the offices of Lindquist & Vennum
P.L.L.P., 4200 IDS Center, 80 South Eighth Street, Minneapolis, Minnesota. The
date of each Option Closing is a "Closing Date." At each Closing:

         (a) the Stockholders selling the Option Shares shall deliver to
PentaPure a certificate signed by each of them stating that the representations
and warranties contained in Section 8 are correct on and as of the Closing Date
as though made on and as of such date, except to the extent specified in writing
in an updated Disclosure Schedule attached to the certificate;

         (b) the Stockholders selling the Option Shares shall deliver to
PentaPure stock certificates representing the Option Shares being purchased by
PentaPure; and

         (c) PentaPure shall deliver to the Stockholders who are selling the
Option Shares payment of the purchase price for exercise of the Option being
exercised.

         8. Representations and Warranties by the Stockholders. Xxxxxxxxxx and
the Stockholders jointly and severally represent and warrant to PentaPure that,
except as expressly stated in the Disclosure Statement attached hereto as
Exhibit 4 (the "Disclosure Statement"):

                  8.1 Organization. Xxxxxxxxxx is a corporation duly organized,
validly existing and in good standing under the laws of the State of Delaware,
is duly qualified as a foreign corporation in the State of Xxxxxxx, and has the
requisite corporate power and authority to own its properties and to carry on
its business in all material respects as it is now being conducted. Xxxxxxxxxx
has the requisite corporate power and authority to perform its obligations under
this Agreement. Xxxxxxxxxx does not have any direct or indirect equity interest
in any other Person (as defined below).

                  8.2 Qualification. Xxxxxxxxxx is duly qualified or licensed as
a foreign corporation in good standing in each jurisdiction wherein the nature
of its activities or of its properties owned or leased makes such qualification
or licensing necessary and failure to be so qualified or licensed would have a
material adverse impact on its business.

                  8.3 Financial Statements. Attached hereto as Exhibit 5 are the
following (the "Financial Statements"): (i) the unaudited financial statements
of Xxxxxxxxxx as of December 31, 2000, and (ii) the unaudited financial
statements of Xxxxxxxxxx as of July 31, 2001 and for the seven months then ended
(the "Balance Sheet Date"). The Financial Statements (i) are in accordance with
the books and records of Xxxxxxxxxx, (ii) presents fairly the financial
condition

                                       3
<PAGE>

of Xxxxxxxxxx as of the dates of the balance sheets included in those financial
statements, and (iii) have been, in all material respects, prepared in
accordance with generally accepted accounting principles applied on a basis
consistent with prior accounting periods. Specifically, but not by way of
limitation, the balance sheet for the Balance Sheet Date, or notes thereto,
disclose all of the debts, liabilities and obligations of any nature (whether
absolute, accrued contingent and whether due or to become due) of Xxxxxxxxxx at
the Balance Sheet Date which, individually or in the aggregate, are material and
which in accordance with generally accepted principles would be required to be
disclosed in such balance sheet, and the omission of which would, in the
aggregate, have a material adverse impact on Xxxxxxxxxx. The balance sheet for
the Balance Sheet Date includes appropriate reserves for all taxes and other
liabilities accrued at such date but not yet payable.

                  8.4 Tax Returns and Audits. All required federal, state and
local tax returns or appropriate extension requests of Xxxxxxxxxx have been
filed, and all federal, state and local taxes required to be paid with respect
to such returns have been paid or due provision for the payment thereof has been
made. Xxxxxxxxxx is not delinquent in the payment of any such tax or in the
payment of any assessment or governmental charge. Xxxxxxxxxx has not received
notice of any tax deficiency proposed or assessed against it, and has not
executed any waiver of any statute of limitations on the assessment or
collection of any tax. None of the Company's tax returns has been audited by
governmental authorities in a manner to bring such audits to the Company's
attention. Xxxxxxxxxx does not have any tax liabilities, except those reflected
in Exhibit 4 hereto and those incurred in the ordinary course of business since
the Balance Sheet Date.

                  8.5 Changes, Dividends, etc. Since the Balance Sheet Date,
Xxxxxxxxxx has not: (a) incurred any debts, obligations or liabilities,
absolute, accrued or contingent and whether due or to become due, except current
liabilities incurred in the ordinary course of business, which (individually or
in the aggregate) will not materially and adversely affect the business,
properties or prospects of Xxxxxxxxxx; (b) paid any obligation or liability
other than, or discharged or satisfied any liens or encumbrances other than
those securing, current liabilities, in each case in the ordinary course of
business; (c) declared or made any payment or distribution to its stockholders
as such, or purchased or redeemed any of its shares of capital stock or other
securities, or obligated itself to do so; (d) mortgaged, pledged or subjected to
lien, charge, security interest or other encumbrance any of its assets, tangible
or intangible, except in the ordinary course of business; (e) sold, transferred
or leased any of its assets except in the ordinary course of business; (f)
canceled or compromised any debt or claim, or waived or released any right of
material value; (g) suffered any physical damage, destruction or loss (whether
or not covered by insurance) materially and adversely affecting the properties,
business or prospects of Xxxxxxxxxx; (h) entered into any transaction other than
in the ordinary course of business; (i) encountered any labor difficulties or
labor union organizing activities; (j) issued or sold any shares of capital
stock or other securities or granted any options, warrants or other purchase
rights with respect thereto other than as contemplated by this Agreement; (k)
made any acquisition or disposition of any material assets or become involved in
any other material transaction, other than for fair value in the ordinary course
of business; (1) increased the compensation payable, or to become payable, to
any of its directors or employees, or made any bonus payment or similar
arrangement with any directors or employees or increased the scope or nature of
any fringe benefits provided for its employees or directors; or (m) agreed to do
any of the foregoing other than pursuant hereto. There has been no material
adverse change in the

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financial condition, operations, results of operations or business of Xxxxxxxxxx
since the Balance Sheet Date.

                  8.6 Title to Properties and Encumbrances. Xxxxxxxxxx has good
and marketable title to all its owned properties and assets, including without
limitation the properties and assets reflected in the Financial Statements and
the properties and assets used in the conduct of its business, except for
property disposed of in the ordinary course of business since the Balance Sheet
Date, which properties and assets are not subject to any mortgage, pledge,
lease, lien, charge, security interest, encumbrance or restriction, except those
which are expressly identified in the Disclosure Schedule. The plant, offices
and equipment owned and leased by Xxxxxxxxxx have been kept in good condition
and repair in the ordinary course of business, and Xxxxxxxxxx has not been
threatened with any action or proceeding under any building or zoning ordinance,
law or regulation.

                  8.7 Litigation; Governmental Proceedings. There are no legal
actions, suits, arbitrations or other legal, administrative or governmental
proceedings or investigations pending or, to the knowledge of Xxxxxxxxxx,
threatened against Xxxxxxxxxx, its properties, assets or business, and
Xxxxxxxxxx is not aware of any facts which are likely to result in or form the
basis for any such action, suit or other proceeding. Xxxxxxxxxx is not in
default with respect to any judgment, order or decree of any court or any
governmental agency or instrumentality. Xxxxxxxxxx has not been threatened with
any action or proceeding under any business or zoning ordinance, law or
regulation.

                  8.8 Compliance with Applicable Laws and Other Instruments. The
business and operations of Xxxxxxxxxx have been and are being conducted in
accordance with all applicable laws, rules and regulations of all governmental
authorities. Neither the execution nor delivery of, nor the performance of or
compliance with, this Agreement nor the consummation of the transactions
contemplated hereby will conflict with, or, with or without the giving of notice
or passage of time, result in any breach of, or constitute a default under, or
result in the imposition of any lien or encumbrance upon any asset or property
of Xxxxxxxxxx pursuant to, any applicable law, administrative regulation or
judgment, order or decree of any court or governmental body, any agreement or
other instrument to which Xxxxxxxxxx is a party or by which it or any of its
properties, assets or rights is bound or affected, and will not violate the
Certificate of Incorporation or Bylaws of Xxxxxxxxxx. Xxxxxxxxxx is not in
violation of its Certificate of Incorporation or its Bylaws nor in violation of,
or in default under, any lien, indenture, mortgage, lease, agreement,
instrument, commitment or arrangement in any material respect.

                  8.9 Outstanding Debt. Xxxxxxxxxx has no indebtedness for
borrowed money, except as otherwise set forth in the Financial Statements.
Xxxxxxxxxx is not in default in the payment of the principal of or interest or
premium on any such indebtedness for borrowed money, and no event has occurred
or is continuing under the provisions of any instrument, document or agreement
evidencing or relating to any such indebtedness for borrowed money which with
the lapse of time or the giving of notice, or both, would constitute an event of
default thereunder.

                  8.10 Authorization. This Agreement is a valid and binding
agreement of the Stockholders enforceable in accordance with its terms, except
as the enforceability thereof may

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be limited by bankruptcy, insolvency, moratorium, reorganization or other
similar laws affecting the enforcement of creditors' rights generally, and
except for judicial limitations on the enforcement of the remedy of specific
enforcement and other equitable remedies.

                  8.11 Retirement Plans. Xxxxxxxxxx does not have any retirement
plan in which any employees of Xxxxxxxxxx participate that is subject to any
provision of the Employee Retirement Income Security Act of 1974 and of the
regulations adopted pursuant thereto ("ERISA").

                  8.12 Environmental and Safety Laws. To the Stockholders
knowledge, Xxxxxxxxxx is not in violation of any applicable statute, law or
regulation relating to the environment or occupational health and safety, and no
material expenditures are or will be required in order to comply with any such
existing statute, law or regulation.

                  8.13 Xxxxxxxxxx Capital Stock. The authorized capital stock of
Xxxxxxxxxx consists of xxxx shares of common stock, of which xxxx shares are
issued and outstanding that are owned beneficially and of record as follows: xxx
shares by Xxxxxxx, xxx shares by Xxxxxxx and xxx shares by XXXXXXX. The managing
partner of XXXXXXX is Xxxxx Xxxxxxx. All of the outstanding shares of capital
stock of Xxxxxxxxxx were duly authorized and validly issued and are fully paid
and nonassessable. There are no outstanding subscriptions, options, warrants,
calls, contracts, demands, commitments, convertible securities or other
agreements or arrangements of any character or nature whatever, except as
otherwise disclosed in the Disclosure Schedule, under which Xxxxxxxxxx is or may
be obligated to issue capital stock or other securities of any kind representing
an ownership interest or contingent ownership interest in Xxxxxxxxxx. Neither
the offer nor the purchase of the Option Shares constitutes an event, under any
anti-dilution provisions of any securities issued or issuable by Xxxxxxxxxx or
any agreements with respect to the issuance of securities by Xxxxxxxxxx, which
will either increase the number of shares issuable pursuant to such provisions
or decrease the consideration per share to be received by Xxxxxxxxxx pursuant to
such provisions. No holder of any security of Xxxxxxxxxx is entitled to any
preemptive or similar rights to purchase securities from Xxxxxxxxxx, except as
otherwise contemplated by this Agreement. All outstanding securities of
Xxxxxxxxxx have been issued in full compliance with an exemption or exemptions
from the registration and prospectus delivery requirements of the Securities Act
and from the registration and qualification requirements of all applicable state
securities laws.

                  8.14 Option Shares. The shares constituting the Initial
Purchase and the Option Shares, when purchased and paid for pursuant to the
terms of this Agreement, will be duly authorized, validly issued and
outstanding, fully paid, nonassessable and will be owned and held by PentaPure
free and clear of all pledges, liens, encumbrances or restrictions created or
suffered to exist by Xxxxxxxxxx or any Stockholder. The certificates
representing the Initial Shares and the Option Shares to be delivered by
Xxxxxxxxxx (or by the Stockholders, as the case may be) upon will be genuine and
valid.

                  8.15 Patents and Other Intangible Rights. Xxxxxxxxxx owns or
possesses adequate licenses or other rights to use all patents, patent
applications, trademarks, trademark applications, service marks, service mark
applications, trade names, copyrights, manufacturing processes, formulae, trade
secrets, customer lists and know how (collectively, "Intellectual Property")
necessary or desirable to the conduct of its business as conducted and as
proposed to

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<PAGE>

be conducted, and no claim is pending or, to the best of any Stockholder's
knowledge, threatened to the effect that the operations of Xxxxxxxxxx infringe
upon or conflict with the asserted rights of any other person under any
Intellectual Property, and to the best of any Stockholder's knowledge there is
no basis for any such claim (whether or not pending or threatened). The
Disclosure Schedule lists and identifies the Intellectual Property. Except as
described on the Disclosure Schedule, no claim is pending or threatened to the
effect that any such Intellectual Property owned or licensed by Xxxxxxxxxx, or
which Xxxxxxxxxx otherwise has the right to use, is invalid or unenforceable by
Xxxxxxxxxx, and to the best of any Stockholder's knowledge there is not basis
for any such claim (whether or not pending or threatened). To the best of any
Stockholder's knowledge, all technical information developed by and belonging to
Xxxxxxxxxx which has not been patented has been kept confidential. Xxxxxxxxxx
has not granted or assigned to any other person or entity any right to
manufacture, have manufactured, assemble or sell the products or proposed
products or to provide the services or proposed services of Xxxxxxxxxx.

                  8.16 Schedule of Assets and Contracts. Xxxxxxxxxx does not own
any real estate. Attached hereto as Exhibit 3 is a Schedule of Assets and
Contracts containing:

                  (a) Annex A: a listing of each indenture, lease, sublease,
         license or other instrument under which Xxxxxxxxxx claims or holds a
         leasehold interest in real property;

                  (b) Annex B: a listing of all written and oral contracts,
         agreements, subcontracts, purchase orders, commitments and arrangements
         involving payments remaining to or from Xxxxxxxxxx in excess of $10,000
         and other agreements material to Xxxxxxxx business to which Xxxxxxxxxx
         is a party or by which it is bound, under which full performance
         (including payment) has not been rendered by any party thereto;

                  (c) Annex C: a listing of all collective bargaining
         agreements, employment agreements, consulting agreements,
         noncompetition agreements, nondisclosure agreements, executive
         compensation plans, profit sharing plans, bonus plans, deferred
         compensation agreements, employee pension retirement plans and employee
         benefit stock option or stock purchase plans and other employee benefit
         plans, entered into or adopted by Xxxxxxxxxx;

                  (d) Annex D: a listing of all deeds of trust, mortgages,
         security agreements, pledge agreements and other agreements or
         arrangements whereby any of the assets or properties of Xxxxxxxxxx are
         subject to any lien, encumbrance, security interest or charge;

                  (e) Annex E: a listing of all leases of personal property
         involving payment remaining to or from Xxxxxxxxxx in excess of $10,000;

                  (f) Annex F: a listing of all bank accounts (or accounts with
         other financial institutions) maintained by Xxxxxxxxxx, together with
         the persons authorized to make withdrawals from such accounts; and

                                       7
<PAGE>

                  (g) Annex G: the name of each employee of Xxxxxxxxxx whose
         annual compensation is in excess of $50,000 and the remuneration
         currently payable to each such employee.

                  Xxxxxxxxxx has provided legal counsel for PentaPure with a
true and complete copy of each document referred to above which such counsel
requests to examine.

                  Xxxxxxxxxx has in all material respects substantially
performed all obligations required to be performed by it to date and is not in
default in any material respect under any of the contracts, agreements, leases,
documents, commitments or other arrangements to which it is a party or by which
it is otherwise bound. All instruments referred to above are in effect and
enforceable according to their respective terms (except as the enforceability
thereof may be limited by bankruptcy, insolvency, moratorium, reorganization or
similar laws affecting the enforcement of creditors' rights generally, and
except for judicial limitations on the enforcement of the remedy of specific
performance and other equitable remedies), and there is not under any of such
instruments any existing material default or event of default or event which,
with notice or lapse of time or both, would constitute an event of default
thereunder. All parties having material contractual arrangements with Xxxxxxxxxx
are in substantial compliance therewith and none are in material default in any
respect thereunder. All plans or arrangements listed pursuant to clause (d)
above are fully funded to the extent that such funding is required by generally
accepted accounting principles.

                  8.17 No Brokers or Finders. No person, firm or corporation has
or will have, as a result of any act or omission of Xxxxxxxxxx or any
Stockholder, any right, interest or valid claim against or upon Xxxxxxxxxx or
PentaPure for any commission, fee or other compensation as a finder or broker,
or in any similar capacity, in connection with the transactions contemplated by
this Agreement. The Stockholders will indemnify and hold each PentaPure harmless
against any and all liability with respect to any such commission, fee or other
compensation which may be payable or determined to be payable in connection with
the transactions contemplated by this Agreement.

                  8.18 Registration Rights. Xxxxxxxxxx has not agreed to
register any of its authorized or outstanding securities under the Securities
Act.

                  8.19 Disclosure. Neither this Agreement, nor any Schedule or
Exhibit to this Agreement contains an untrue statement of a material fact or
omits a material fact necessary to make the statements contained herein or
therein not misleading. None of the statements, documents, certificates or other
items prepared or supplied by Xxxxxxxxxx with respect to the transactions
contemplated hereby contains an untrue statement of a material fact or omits a
material fact necessary to make the statements contained therein not misleading.
There is no fact which Xxxxxxxxxx has not disclosed to PentaPure and of which
Xxxxxxxxxx is aware which materially and adversely affects or could materially
and adversely affect the business, prospects, financial condition, operations,
property or affairs of Xxxxxxxxxx or any of its subsidiaries. The financial
projections and other estimates contained in the Company's Business Plan
provided to PentaPure were prepared by a consultant to Xxxxxxxxxx, and approved
by Xxxxxxxxxx, based on Xxxxxxxxxx' experience in the industry and on
assumptions as to future events which Xxxxxxxxxx, at the date of the issuance of
the Business Plan, believed to be reasonable, but which Xxxxxxxxxx cannot and
does not assure or guarantee the attainment of in any manner.

                                       8
<PAGE>

The parties acknowledge that the Business Plan assumed a significant infusion of
capital into Xxxxxxxxxx which, as a result of entering into this Agreement, will
not and is not intended to occur. PentaPure agrees that any decision to exercise
an Option shall be based solely on information concerning Xxxxxxxxxx that
PentaPure obtains from and after the date of this Agreement.

         9. Affirmative Covenants. Until the termination of this Agreement as
provided in Section 13 below, Xxxxxxxxxx agrees to abide by, and the
Stockholders jointly and severally agree that they each will cause Xxxxxxxxxx to
abide by, the following covenants:

                  9.1 Corporate Existence. Xxxxxxxxxx will maintain its
corporate existence in good standing and comply with all applicable laws and
regulations of the United States or of any state or states thereof or of any
political subdivision thereof and of any governmental authority where failure to
so comply would have a material adverse impact on Xxxxxxxxxx or its business or
operations.

                  9.2 Books of Account and Reserves. Xxxxxxxxxx will keep books
of record and account in which full, true and correct entries are made of all of
its dealings, business and affairs, in accordance with generally accepted
accounting principles. Xxxxxxxxxx will employ certified public accountants
selected by the Board of Directors of Xxxxxxxxxx who are "independent" within
the meaning of the accounting regulations of the Commission, and have annual
audits made by such independent public accountants.

                  9.3 Furnishing of Financial Statements and Information.
Beginning xxxxxxxxxxxxxxxx, Xxxxxxxxxx will deliver to PentaPure:

                  (a) as soon as practicable, but in any event within 30 days
         after the close of each month, unaudited balance sheets of Xxxxxxxxxx
         and any Subsidiaries (as hereinafter defined) as of the end of such
         month, together with the related statements of operations and cash flow
         for such month, setting forth the budgeted figures for such month and
         in comparative form figures for the corresponding month of the previous
         fiscal year, all in reasonable detail and certified by an authorized
         accounting officer of Xxxxxxxxxx, subject to year-end adjustments;

                  (b) as soon as practicable, but in any event within 60 days
         after the end of each fiscal year, a consolidated balance sheet of
         Xxxxxxxxxx and its Subsidiaries, as of the end of such fiscal year,
         together with the related consolidated statements of operations,
         stockholders, equity and cash flow for such fiscal year, setting forth
         in comparative form figures for the previous fiscal year, all in
         reasonable detail and duly certified by the Company's independent
         public accountants, which accountants shall have given Xxxxxxxxxx an
         opinion, unqualified as to the scope of the audit, regarding such
         statements;

                  (c) promptly after the submission thereof to Xxxxxxxxxx,
         copies of all reports and recommendations submitted by independent
         public accountants in connection with any annual or interim audit of
         the accounts of the company or any of its Subsidiaries made by such
         accountants;

                                       9
<PAGE>

                  (d) within 10 days after Xxxxxxxxxx learns in writing of the
         commencement or threatened commencement of any material suit, legal or
         equitable, or of any material administrative, arbitration or other
         proceeding against Xxxxxxxxxx or its businesses, assets or properties,
         written notice of the nature and extent of such suit or proceeding; and

                  (e) with reasonable promptness, such other financial data
         relating to the business, affairs and financial condition of Xxxxxxxxxx
         as is available to Xxxxxxxxxx and as from time to time PentaPure may
         reasonably request.

                  9.4 Inspection. Upon 15 days notice, Xxxxxxxxxx will permit
PentaPure and any of its officers or employees, or any outside representatives
designated by such PentaPure and reasonably satisfactory to Xxxxxxxxxx, to visit
and inspect any of the properties of Xxxxxxxxxx, including its books and records
(and to make photocopies thereof or make extracts therefrom), and to discuss its
affairs, finances, and accounts with its officers, lawyers and accountants,
except with respect to trade secrets and similar confidential information, all
to such reasonable extent and at such reasonable times and intervals as such
PentaPure may reasonably request. Except as otherwise required by laws or
regulations applicable to a PentaPure, PentaPure shall maintain, and shall
require their representatives to maintain, all information obtained pursuant to
Section 3.3 hereof and this Section 3.4 on a confidential basis.

                  9.5 Payment of Taxes and Maintenance of Properties. Xxxxxxxxxx
will:

         (a) pay and discharge promptly, or cause to be paid and discharged
promptly when due and payable, all taxes, assessments and governmental charges
or levies imposed upon it or upon its income or upon any of its properties, as
well as all material claims of any kind (including claims for labor, material
and supplies) which, if unpaid, might by law become a lien or charge upon its
property; provided, however, that Xxxxxxxxxx shall not be required to pay any
such tax, assessment, charge, levy or claim if the amount, applicability or
validity thereof shall currently be contested in good faith by appropriate
proceedings and if Xxxxxxxxxx shall have set aside on its books reserves
(segregated to the extent required by generally accepted accounting principles)
deemed adequate by it with respect thereto; and

         (b) maintain and keep, or cause to be maintained and kept, its
properties in good repair, working order and condition, and from time to time
make, or cause to be made, all repairs and renewals and replacements which in
the opinion of Xxxxxxxxxx are necessary and proper so that the business carried
on in connection therewith may be properly and advantageously conducted at all
times; Xxxxxxxxxx will maintain or cause to be maintained back-up copies of all
valuable papers and software.

                  9.6 Insurance. Xxxxxxxxxx will obtain and maintain in force
such property damage, public liability, business interruption, worker's
compensation, indemnity bonds and other types of insurance as the Company's
executive officers, after consultation with an accredited insurance broker,
shall determine to be necessary or appropriate to protect Xxxxxxxxxx from the
insurable hazards or risks associated with the conduct of the Company's
business. The Company's executive officers shall periodically report to the
Board of Directors on the status of such insurance coverage. All insurance shall
be maintained in at least such amounts and to such extent as shall be determined
to be reasonable by the Board of Directors; and all such insurance shall be
effected and maintained in force under a policy or policies issued by insurers

                                       10
<PAGE>

of recognized responsibility, except that Xxxxxxxxxx may effect worker's
compensation or similar insurance in respect of operations in any state or other
jurisdiction either through an insurance fund operated by such state or other
jurisdiction or by causing to be maintained a system or systems of
self-insurance which is in accord with applicable laws.

                  9.7 Payment of Indebtedness and Discharge of Obligations.
Xxxxxxxxxx will pay or cause to be paid the principal of and interest and
premium, if any, on all indebtedness for borrowed money heretofore or hereafter
incurred or assumed by it when and as the same shall become due and payable,
unless such indebtedness for borrowed money is renewed or extended. Xxxxxxxxxx
will faithfully observe, perform and discharge all of the material covenants,
conditions and obligations which are imposed on it by any and all indentures and
other agreements securing or evidencing such indebtedness for borrowed money or
pursuant to which such indebtedness for borrowed money is issued, and will not
permit the continuance of any act or omission which is or under the provisions
thereof may be declared to be a material default thereunder, unless such default
is waived pursuant to the provisions thereof. Xxxxxxxxxx shall not be required
to make any payment or to take any other action by reason of this Section 9.7 at
any time while it shall be currently contesting in good faith by appropriate
proceedings its obligations to make such payment or to take such action provided
that Xxxxxxxxxx shall have set aside on its books reserves (segregated to the
extent required by generally accepted accounting principles) deemed adequate by
it with respect thereto.

                  9.8 Retirement Plans. Xxxxxxxxxx will cause each retirement
plan of Xxxxxxxxxx in which any employees of Xxxxxxxxxx participate that is
subject to the provisions of ERISA and the documents and instruments governing
each such plan to be conformed to when necessary, and to be administered in a
manner consistent with, those provisions of ERISA which may, from time to time,
become effective and operative with respect to such plans; if requested by
PentaPure in writing from time to time, furnish to PentaPure a copy of any
annual report with respect to each such plan that Xxxxxxxxxx files with the
Secretary of Labor pursuant to ERISA; and at such time as such insurance shall
be available at rates deemed commercially reasonable by Xxxxxxxxxx, maintain
insurance against the contingent liability against the net worth of Xxxxxxxxxx
imposed in respect of each such plan by the provisions of ERISA.

                  9.9 Preparation and Approval of Budgets. In the event that
PentaPure exercises the First Option, then for each fiscal year of Xxxxxxxxxx
thereafter at least one month prior to the beginning of the fiscal year
Xxxxxxxxxx shall prepare and submit to its Board of Directors, for its review
and approval, an annual plan for such year, which shall include monthly capital
and operating expense budgets, cash flow statements and profit and loss
projections itemized in such detail as the Board of Directors may reasonably
request. Each annual plan shall be modified as often as is necessary in the
judgment of the Board of Directors to reflect changes required as a result of
operating results and other events that occur, or may be reasonably expected to
occur, during the year covered by the annual plan, and copies of each such
modification shall be submitted to the Board of Directors. Xxxxxxxxxx will,
simultaneously with the submission thereof to the Board of Directors, deliver a
copy of each such annual plan and modification thereof to PentaPure.

                  9.10 Board of Directors. (a) In the event that PentaPure
exercises the First Option, it shall have the right to designate one member of
Xxxxxxx Board of Directors, which shall consist of not more than four persons.
In the event that PentaPure exercises both the First

                                       11
<PAGE>

Option and the Second Option, PentaPure shall have the right to designate two
members of Xxxxxxx Board of Directors, which shall consist of the two PentaPure
representatives, two representatives of the Stockholders, and a fifth director
who is mutually agreed upon by PentaPure and the Stockholders.

         (b) Members of the Board of Directors designated by PentaPure shall be
entitled to all of the rights and subject to all of the obligations of all
directors of Xxxxxxxxxx, as provided in its Articles of Incorporation, Bylaws
and by law. Xxxxxxxxxx shall notify PentaPure of all regular meetings and
special meetings of the Board of Directors of Xxxxxxxxxx at least ten business
days in advance of such meetings, and afford any representative designated by
PentaPure the right and opportunity to attend any such meeting. Such
representative(s) shall be entitled to receive all written materials and other
information given to directors of Xxxxxxxxxx in connection with any such meeting
at the time such materials or information are given to such directors.
Xxxxxxxxxx agrees, as a general practice, to hold a meeting of its Board of
Directors at least once every quarter.

         10. Negative Covenants. In the event that PentaPure exercises the First
Option, then until the termination of this Agreement as provided in Section 11
below (or such other period as is stated below as to certain specific
covenants), the Stockholders jointly and severally agree that they each will
cause Xxxxxxxxxx to abide by the covenants set forth below:

                  10.1 Liens. If PentaPure exercises the First Option, then from
and after such exercise Xxxxxxxxxx will not grant or create, incur, assume or
suffer to exist any lien, pledge, or security interest which applies to all or
substantially all of its assets, except for liens, pledges or security interests
granted to or held by one or more commercial banks or other regulated commercial
lenders.

                  10.2 Indebtedness. If PentaPure exercises the First Option,
then from and after such exercise Xxxxxxxxxx will not incur, create, assume or
permit to exist any indebtedness for borrowed money or indebtedness evidenced by
promissory notes, bonds, debentures or similar obligations, except for
indebtedness to one or more commercial banks or other regulated commercial
lenders, and loans from Stockholders.

                  10.3 Guaranties. Xxxxxxxxxx will not assume, guarantee,
endorse or otherwise become directly or contingently liable in connection with
any obligations of any other person, except:

         (a) the endorsement of negotiable instruments by Xxxxxxxxxx for deposit
or collection or similar transactions in the ordinary course of business; and

         (b) guaranties, endorsements and other direct or contingent liabilities
in connection with the obligations of other Persons in existence on the date
hereof and listed on the Disclosure Schedule.

                  10.4 Investments and Loans. Xxxxxxxxxx will not purchase or
hold beneficially any stock or other securities or evidences of indebtedness of,
make or permit to exist any loans or advances to, or make any investment or
acquire any interest whatsoever in any other Person except:

                                       12
<PAGE>

         (a) investments in existence on the date hereof and listed on the
Disclosure Schedule;

         (b) investments in direct obligations of the United States of America
or any agency or instrumentality thereof whose obligations constitute full faith
and credit obligations of the United States of America having a maturity of one
year or less, commercial paper issued by U.S. corporations rated "A-1" or "A-2"
by Standard & Poors Corporation or "P-1" or "P-2" by Moody's Investors Service
or certificates of deposit or bankers' acceptances having a maturity of one year
or less issued by members of the Federal Reserve System having deposits in
excess of $100,000,000;

         (c) loans in the ordinary course of business to officers and employees
of Xxxxxxxxxx as travel advances and the like not exceeding at any one time an
aggregate of $10,000; and

         (d) advances in the ordinary course of business in the form of progress
payments, prepaid rent or security deposits.

                  10.5 [Intentionally deleted.]

                  10.6 Sale of Assets. Xxxxxxxxxx will not sell, lease, assign,
transfer or otherwise dispose of (whether in one transaction or in a series of
transactions) all or a material part of its assets to any other Person;
provided, however, that the restrictions contained in this Section shall not
apply to or prevent sales or leases by a Xxxxxxxxxx of its properties in the
ordinary course of business or sales or leases by a Xxxxxxxxxx of its surplus,
obsolete or worn-out properties. For purposes of this Section, "material part"
means 10% or more of the book value of assets of Xxxxxxxxxx as determined in
accordance with generally accepted accounting principles.

                  10.7 Consolidation and Merger. Xxxxxxxxxx will not consolidate
with or merge into any Person, or permit any other Person to merge into it, or
acquire (in a transaction analogous in purpose or effect to a consolidation or
merger) all or substantially all the assets of any other Person.

                  10.8 Sale and Leaseback. Xxxxxxxxxx will not enter into any
arrangement, directly or indirectly, with any other Person whereby Xxxxxxxxxx
shall sell or transfer any real or personal property, whether now owned or
hereafter acquired, and then or thereafter rent or lease as lessee such property
or any part thereof or any other property which Xxxxxxxxxx intends to use for
substantially the same purpose or purposes as the property being sold or
transferred.

                  10.9 Stockholder Compensation. If PentaPure exercises the
First Option, then from and after such exercise Xxxxxxxxxx will not pay any
wage, salary or bonus to, or provide any fringe benefits for, any of the
Stockholders, or any relative or affiliate of any of the Stockholders, except
for services actually rendered by the recipient and in amounts which are
reasonable as compensation for such services.

                                       13
<PAGE>

                  10.10 Restrictions on Nature of Business. Xxxxxxxxxx will not
engage in any line of business materially different from that presently engaged
in by it, specifically, air and water filtration, and porous plastic components.

                  10.11 Issuance of Stock. Until the Second Option has been
exercised or expired, Xxxxxxxxxx will not issue any new capital stock.

         11. Limited Exclusivity. The Stockholders shall cause Xxxxxxxxxx not to
sell or otherwise supply any of its products, either directly or indirectly, to:
(a) xxxxxxxxxxxxxxxx or any of its subsidiaries; (b) any manufacturer of
refrigerators (including without limitation xxxxx) anywhere in the world; or (c)
to any customer or end-user located in the country of xxxxx or for eventual
delivery to or use by anyone in the country of xxxxx. Notwithstanding the
foregoing, Xxxxxxxxxx shall be free to sell its products to manufacturers who
incorporate them into finished goods which are then delivered to customers or
end-users in the country of xxxxx, and the provisions of this Section 9 shall
not apply where the Stockholders do not have knowledge that products supplied by
Xxxxxxxxxx are being used in one or more of the restricted applications referred
to above.

         12. Certain Definitions. Except as otherwise expressly provided or
unless the context otherwise requires, the terms defined in this Section have
the following meanings:

         "Ancillary Agreements" means the Escrow Agreement and the Buy-Sell
Agreement.

         "Person" means any individual, corporation, partnership, joint venture,
association, joint stock company, limited liability company, trust,
unincorporated organization, government, or any agency or political subdivision
thereof.

         "Subsidiary" shall mean any corporation, association or other business
entity more than a majority (by number of votes) of the voting stock of which is
owned or controlled, directly or indirectly, by Xxxxxxxxxx or by one or more of
its Subsidiaries or both.

         13. Termination. This Agreement and the Escrow Agreement shall
terminate upon the earliest of:

         (a) xxxxxxxxxxxxx, if PentaPure has not give timely notice exercising
the First Option and does not subsequently close the purchase of the First
Option Shares;

         (b) the date that the Stockholders complete the repurchase of the First
Option Shares, if PentaPure has not given timely notice exercising the Second
Option and does not subsequently close the purchase of the Second Option Shares;

         (c) if PentaPure cancels or terminates the Supply Agreement for a
reason other than breach by Xxxxxxxxxx, then within 30 days after such
cancellation the Stockholders may give written notice to PentaPure canceling
this Agreement and the Escrow Agreement.

Upon termination of this Agreement and the Escrow Agreement, any Option Shares
not purchased by PentaPure shall be released from escrow and returned to their
owner. In the event that this Agreement terminates under clause (a) above
because PentaPure does not exercise the

                                       14
<PAGE>

First Option, then the Buy-Sell Agreement shall also terminate with the
termination of this Agreement.

         14. No Waiver; Cumulative Remedies. No failure or delay on the part of
any party in exercising any right, power or remedy hereunder or under the
Ancillary Agreements shall operate as a waiver thereof; nor shall any single or
partial exercise of any such right, power or remedy preclude any other or
further exercise thereof or the exercise of any other right, power or remedy
hereunder or under the other Ancillary Agreements. The remedies herein and in
the other Ancillary Agreements provided are cumulative and not exclusive of any
remedies provided by law.

         15. Amendments, Etc. No amendment, modification, termination or waiver
of any provision of this Agreement or the Ancillary Agreements or consent to any
departure therefrom shall be effective unless the same shall be in writing and
signed by the parties and then such waiver or consent shall be effective only in
the specific instance and for the specific purpose for which given.

         16. Addresses for Notices, Etc. Except as otherwise expressly provided
herein, all notices, requests, demands and other communications provided for
hereunder and under the Ancillary Agreements shall be in writing and mailed or
delivered to the applicable party at its address indicated below:

         If to Xxxxxxxxxx or to any Stockholder: to Xxxxxxxxxx and to all of the
Stockholders, at Xxxxxxxxxx, Xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, Attention:
President

         If to PentaPure: 1000 Apollo Road, Eagan, Minnesota 55121, Attention:
President

or, as to each party, at such other address as shall be designated by such party
in a written notice to the other party complying as to delivery with the terms
of this Section. All such notices, requests, demands and other communications
shall, when mailed, be effective when deposited in the mails, by certified or
registered mail, addressed as aforesaid.

         17. Costs and Expenses. In the event that any party to this Agreement
or the Ancillary Agreements commences any litigation or arbitration proceeding
to enforce this Agreement or an Ancillary Agreement following a breach thereof
by another party, the prevailing party in such litigation or arbitration shall
be entitled to recover its costs incurred in such litigation or arbitration,
including without limitation reasonable attorneys fees.

         18. Binding Effect, Assignment. This Agreement and the Ancillary
Agreements shall be binding upon and inure to the benefit of the parties hereto
and their respective heirs, personal representatives, successors and assigns,
except that the parties shall not have the right to assign their respective
rights hereunder or any interest herein without the prior written consent of all
the other parties. Notwithstanding the foregoing, the PentaPure's rights and
obligations under this Agreement and the Ancillary Agreements shall be
assignable by it to any purchaser or all or substantially all of PentaPure's
business or that of PentaPure's parent corporation.

                                       15
<PAGE>

         19. Time of the Essence. Time is of the essence as to the payment and
performance of all obligations and agreements of Xxxxxxxxxx under this Agreement
and the Ancillary Agreements.

         20. Governing Law. This Agreement and the Ancillary Agreements shall be
governed by, and construed in accordance with, the laws of the State of
Xxxxxxxx.

         21. Severability of Provisions. Any provision of this Agreement or the
Ancillary Agreements which is prohibited or unenforceable shall be ineffective
to the extent of such prohibition or unenforceability without invalidating the
remaining provisions hereof.

         22. Headings. Article and Section headings in this Agreement are
included herein for convenience of reference only and shall not constitute a
part of this Agreement for any other purpose.

         23. Arbitration of Disputes. Any and all disputes between any of the
parties hereto which arise under this Agreement, or relate to any alleged breach
of this Agreement, shall be submitted to binding arbitration before a single
arbitrator in accordance with the Commercial Arbitration Rules of the American
Arbitration Association. The arbitration shall be held in Xxxxxxx, Xxxxxx unless
the parties to the arbitration agree to another location. Judgment on the
arbitrator's decision may be entered in any court having jurisdiction.

                                       16
<PAGE>

         IN WITNESS WHEREOF, the parties have executed this Agreement as of the
date first written above.

STOCKHOLDERS:                                             PENTAPURE INCORPORATED

______________________________                            By /s/ James Carbonari
         XXXXxxxxxx                                       Its    CEO

______________________________
         xxxxxxxxxxxx

XXXXXXXXXXXX                                              WTC INDUSTRIES, INC.

By ___________________________                            By /s/ James Carbonari
Its __________________________                            Its    CEO

                                       17

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