Document:

<PAGE>

                                                                   Exhibit 4.1.1

                                                               November 19, 2001

Mr. John H. Welker
President
Numatics, Inc.
1450 North Milford Road
Highland, Michigan 48357

Dear John:

         You have advised American Capital Strategies, Ltd. ("ACS") and American
Capital Financial Services ("ACFS" and together with ACS, "ACAS"), that Numatics
Incorporated (the "Company") intends to refinance its existing senior debt (the
"Transaction").

         We are pleased to advise you that on the terms and subject to the
conditions set forth herein and in the attached Financing Term Sheet dated
October 16, 2001 and in the latest draft of the Note Purchase Agreement
distributed on November 15, 2001 and all accompanying Purchase Documents (which
form a part of this letter and are incorporated herein by reference), ACAS is
willing to purchase the following securities from the Company:

                  $14,354,000 Senior Secured Term A Notes;
                  $17,000,000 Senior Secured Term B Notes.
                  $31,354,000 Total Financing ("Total Financing").

         These purchases are being made in connection with, and are conditioned
on, certain conditions described in the attached Financing Term Sheet. Closing
of the Transaction (the "Closing") is anticipated to occur on or before November
30, 2001.

         ACAS will not be obligated to make any loan or investment unless and
until all the conditions referred to or set forth in this letter and the
attached Financing Term Sheet and all other conditions which may be required by
ACAS have been satisfied.

         You have agreed and hereby affirm that in consideration of the services
performed and to be performed by ACAS in connection with this Transaction, ACAS
shall be compensated by the payments to ACFS of certain fees and by the
reimbursement to ACFS of certain expenses as described in the attached Financing
Term Sheet. In addition, the Company shall pay ACFS a Commitment Fee equal to
$10,000 per day for each day the commitment letter is outstanding.

         The Company agrees to indemnify and hold harmless ACAS and it
affiliates and each of their respective directors, officers, employees and
agents (collectively, the

<PAGE>

John H. Welker, President
Numatics, Inc.
November 19, 2001
Page 2

"Indemnified Parties" and individually, an "Indemnified Party"), from and
against any and all losses, claims, damages, expenses or liabilities to which
any Indemnified Party may become subject, insofar as such losses, claims,
damages, expenses or liabilities (or actions, suits or proceedings, including
any inquiry or investigation or claims in respect thereof) arise out of, in any
way relate to, or result from a claim made by a Third Party (as hereinafter
defined) in respect of, the transactions described in this letter or the
financing contemplated hereby (whether or not any Indemnified Party is a party
to any action or proceeding out of which any such losses, claims, damages,
expenses or liabilities arise), and to reimburse each Indemnified Party upon
demand, for any legal or other expenses incurred by any Indemnified Party in or
in connection with investigating, preparing to defend, defending or otherwise
participating in any such claim, action or proceeding related to any such loss,
claim, damage or liability, except that the Company shall not be obligated to
indemnify, hold harmless or reimburse any Indemnified Party to the extent that
any such losses, claims, damages, expenses or liabilities are determined in a
final judgment by a court of competent jurisdiction to have resulted solely from
the gross negligence or willful misconduct of such Indemnified Party. The term
"Third Party" as used in this letter means any person, corporation or entity
other than the Company.

         The commitment represented by this letter will terminate at 5:00 p.m.
Eastern Daylight Time on November 26, 2001 unless ACAS has received written
acceptance and any Commitment Fee due prior to that time. If this letter is
accepted and the Commitment Fee is received on or before its expiration in
accordance with the preceding sentence, this commitment will nevertheless
terminate at 5:00 p.m. Eastern Daylight Time on December 19, 2001 unless
definitive documentation, satisfactory in form and substance to ACAS, shall have
been entered into and the transaction contemplated hereby shall have been Closed
on or prior to such time.

         This letter may be executed by the parties hereto in one or more
counterparts, each of which shall be an original and all of which together shall
constitute but one and the same agreement.

         Neither the contents nor existence of this letter may be disclosed by
you or the Company to any Third Party unless and until this letter has been
accepted by you. ACAS will not be responsible or liable to any person for any
damages which may be alleged as a result of the existence of this letter or the
acceptance thereof.

<PAGE>

John H. Welker, President
Numatics, Inc.
November 19, 2001
Page 3

         If you are in agreement with the foregoing, please sign and return to
ACAS at the address indicated above an enclosed copy of this letter, along with
the payment due hereunder. Upon receipt of copies hereof duly signed by you,
ACAS' and the Company's undertakings hereunder shall become effective to the
extent and in the manner provided herein.

                                     Very truly yours,

                                     AMERICAN CAPITAL STRATEGIES, LTD.

                                     By /s/ Mark Schindel
                                        -----------------
                                       Mark Schindel, Principal
                                       ------------------------

                                     ACS CAPITAL FINANCIAL SERVICES

                                     By /s/ Mark Schindel
                                        -----------------
                                       Mark Schindel, Vice President
                                       -----------------------------

                                     AGREED AND ACCEPTED as of this 19th day of
                                     November.

                                     NUMATICS, INCORPORATED

                                     By:    /s/ Robert P. Robeson
                                            ----------------------

                                     Name:  Robert P. Robeson
                                            ----------------------

                                     Title: Vice President
                                            ----------------------

<PAGE>

                        AMERICAN CAPITAL STRATEGIES, LTD.

                              FINANCING TERM SHEET

                                       FOR

                             Numatics, Incorporated

I.   GENERAL TERMS
     -------------

A.   DATE OF TERM SHEET
     October 16, 2001

B.   ISSUER
     Numatics, Incorporated (the "Company")

C.   PURCHASER
     American Capital Strategies, Ltd. ("American Capital")

D.   TOTAL INVESTMENT BY AMERICAN CAPITAL

     1.   SENIOR SECURED TERM A NOTES ("TERM A NOTES")
          The "Term A Notes" shall total:                          $14,354,000

     2.   SENIOR SECURED TERM B NOTES ("TERM B NOTES")
          The "Term B Notes" shall total:                          $17,000,000

     3.   TOTAL
          The "Total Financing" shall total:                       $31,354,000

E.   DEFINITIONS

     1.   NOTES
          The Senior Secured Term A Notes and the Senior Term B Notes together
          shall be referred to as the "Notes."

F.   USE OF PROCEEDS
     Refinancing the senior debt.

G.   CLOSING DATE
     The date of the closing is to be determined, but American Capital shall
     target a closing no later than October 31, 2001 (the "Close" or "Closing").

<PAGE>

Numatics, Incorporated                                                    Page 2
--------------------------------------------------------------------------------

II.  SENIOR SECURED TERM A NOTES

A.     AMOUNT                                                      $14,354,000.
       The allocation of the Notes between the Term A and the Term B is
       dependant upon updating the real estate appraisals. The Term A may be
       divided into multiple notes.

B.     MATURITY
       The Term A Notes will mature on October 31, 2006 (the "Term A Maturity
       Date").

C.     AMORTIZATION
       The Term A Notes will amortize at the same schedule proposed by LaSalle
       Business Credit, with a bullet payment made for the remaining principal
       on the Term A Maturity Date.

D.     EXCESS CASH FLOW SWEEP
       The Company shall allocate 25% of its Excess Cash Flow towards prepayment
       of the Term A Notes, to be applied in reverse order of maturity. Excess
       Cash Flow is net profit after tax plus depreciation, plus amortization,
       less capital expenditures (not financed) and obligations due on the
       Notes. Payments will be quarterly based on management prepared financial
       statements presented on a consolidated basis.

E.     INTEREST
       Interest shall be payable monthly in arrears on the first business day of
       each month 1) in cash at a variable rate equal to Prime plus 6.5
       percentage points with a minimum rate of 12 percentage points. The
       interest option would be determined at Close. Interest payments shall be
       computed on the basis of a 360-day year composed of twelve 30-day months,
       and the actual number of days elapsed.

III. SENIOR SECURED TERM B NOTES
     ---------------------------

A.     AMOUNT                                                      $17,000,000.

B.     MATURITY
       The Term B Notes will mature on October 31, 2006 (the "Term A Maturity
       Date").

C.     AMORTIZATION
       The loan will be fully repaid on the Term B Maturity Date.

D.     INTEREST
       Interest shall be payable monthly in arrears on the first business day of
       each month 1) in cash at a fixed rate equal to 17 percentage points plus
       2) 2.00 percentage points payable in kind ("PIK"), due on the Term B
       Maturity Date. The Company shall have the option

<PAGE>

Numatics, Incorporated                                                    Page 3
--------------------------------------------------------------------------------

       to pay the 2.00% PIK portion in cash. Interest payments shall be computed
       on the basis of a 360-day year composed of twelve 30-day months, and the
       actual number of days elapsed.

IV.  TERMS OF THE NOTES
     ------------------

A.     OPTIONAL PREPAYMENT
       The Company may prepay the Notes in multiples of $100,000.

       Optional prepayments will be applied in inverse order of maturity.

       The Company will pay a prepayment fee on the Term B Note in the first
       year of 3% of the amount prepaid, 2% in the second year, 1% in the third
       year and will incur no prepayment fee thereafter.

       The prepayment fees will not apply to the excess cash flow sweep.

B.     MANDATORY PREPAYMENTS
       Mandatory prepayments of the Notes will be made upon the occurrence of
       any of the following events:

       1.   A sale of the Company;

       2.   A change in control, merger, consolidation or similar combination,
            sale of a material portion of the Company's assets, or other similar
            transaction; or

       3.   A change in responsibility or role of John Welker.

       4.   A default on the High Yield Notes.

       Mandatory prepayments will be subject to the same prepayment fees as
       optional prepayments (assuming the Company is not in a payment default),
       in addition to default interest rates if appropriate.

C.     COLLATERAL SECURITY
       The Notes and obligations to repurchase any Company securities owned by
       American Capital will be secured by a valid security interest in all of
       the Company's assets, including without limitation all contract rights,
       real estate, machinery, furniture, fixtures and equipment, capital
       leases, and receivables of the Company.

D.     ADDITIONAL DEBT
       At Closing, the Company shall have no other funded debt other than the
       debt shown on the August 31, 2001 balance sheet presented in the
       Confidential Memorandum, less the total of the new $35 million of senior
       debt financing led by LaSalle Bank and the Notes (the "Additional Debt").
       The $35 million LaSalle financing will consist of a $35 million revolving
       line of credit (the "RLOC").

<PAGE>

Numatics, Incorporated                                                    Page 4
--------------------------------------------------------------------------------

E.   INTER-CREDITOR OR AGENCY AGREEMENT
     An Inter-Creditor or Agency Agreement acceptable to American Capital
     between American Capital and any senior lender will provide American
     Capital a first lien on the Company's PP&E and a second lien on the
     Company's current assets. The senior lender will receive a first lien on
     the Company's current assets, and a second lien on the Company's PP&E.

F.   REPRESENTATIONS AND WARRANTIES
     The documentation for the Total Financing shall contain such
     representations and warranties as are customary for loans and investments
     of a similar size and nature, including but not limited to, representations
     regarding due organization, principal place of business of the Company,
     litigation, taxes, other debts, leases, information provided, management's
     background, subsidiaries, identification of management, no material
     changes, no side agreements, compliance with laws and no brokers.

G.   FINANCIAL COVENANTS [IN PROCESS OF COMPLETING]
     The documentation for the Notes shall contain financial covenants of the
     Company, including but not limited to:

     1.   Minimum fixed charge coverage ratio;

     2.   Maximum debt to EBITDA ratio;

     3.   Maximum debt to equity ratio; and

     4.   Other financial covenants acceptable to American Capital.

     Such covenants shall be based on the most recent twelve months' performance
     of the Company.

H.   NEGATIVE COVENANTS
     The documentation for the Notes shall contain negative covenants of the
     Company, including but not limited to:

     1.   No funded debt except Additional Debt that declines by the amount of
          scheduled principal payments (excluding existing funded debt). The
          Additional Debt may increase further by an increase in the RLOC if
          such increase would be supported by the advance rates under the
          revolving line of credit and the standards concerning qualified
          receivables and inventory existing at Closing;

     2.   No breach of the terms of the Additional Debt;

     3.   The Company would not be put into bankruptcy without a unanimous vote
          by the board of directors.

     4.   The Company would not default on the High Yield Notes without a
          unanimous consent by the board of directors.

     5.   No sale of common stock by John Welker;

     6.   No material changes in the business of the Company;

<PAGE>

Numatics, Incorporated                                                    Page 5
--------------------------------------------------------------------------------

     7.   No stock issuances except those provided for in existing employee
          compensation plans;

     8.   No dividends to shareholders;

     9.   No investment banking fees other than the payment due to Woodward
          Capital Advisors at Closing;

     10.  No change of location of the corporate headquarters;

     11.  No transactions with affiliates and subsidiaries (outside the ordinary
          course of business), equity owners (other than permitted redemptions
          under existing employee compensation plans) or related parties;

     12.  No changes in corporate structure;

     13.  No purchases or carrying of "margin securities" with the proceeds of
          the Total Financing;

     14.  No mergers, acquisitions, sales of corporate assets outside the
          ordinary course of business; and

     15.  No additional leases, liens and investments except within amounts to
          be mutually agreed to between American Capital and the Company.

I.   AFFIRMATIVE COVENANTS

     The documentation for the Note will include affirmative covenants of the
     Company requiring the Company:

     1.   To provide monthly financial statements, annual audits (by an auditor
          acceptable to American Capital), projections, monthly officer
          certificates, copies of material agency filing and material litigation
          filings and copies of default notices;

     2.   To hold quarterly board meetings;

     3.   To maintain adequate hazard and business interruption insurance and
          key man life insurance;

     4.   To provide a right of first offer to American Capital to participate
          in future financings of the Company provided however that the Company
          shall not be obligated in any way as a result of such first offer; and

     5.   To provide access to Company information subject to American Capital
          agreeing to reasonable confidentiality provisions.

J.   DEFAULTS

     The Notes shall be in default under the following circumstances:

     1.   Failure to pay interest and principal when due with respect to any
          portion of the Total Financing or any other indebtedness of the
          Company;

     2.   Failure to comply with or observe covenants subject to cure periods to
          be negotiated;

     3.   Default under the terms of the Additional Debt;

     4.   Misrepresentation or breach of warranty; and

<PAGE>

Numatics, Incorporated                                                    Page 6
--------------------------------------------------------------------------------

     5. Such other defaults as are customary for Notes of a similar nature. In
     default the interest rates on the Notes will increase by 2%.

V.   OTHER TERMS
     -----------

A.   BOARD RIGHTS

     American Capital shall have the right to designate one Director for so long
     as the Notes are outstanding. In the event that American Capital shall
     waive its right to designate a Director, it will receive BOD meeting
     attendance privileges and rights to receive all information normally
     provided to Directors and will receive reimbursement of out of pocket
     expenses.

     The BOD shall mean the boards of directors of the Company. American Capital
     shall also have the ability to exercise a right to a seat on any subsidiary
     board; to the extent such board deals with matters outside the day-to-day
     operation of such subsidiary.

     American Capital shall have the right to elect that number of Directors
     sufficient to constitute a majority of the BOD if (i) there is a payment
     default on the Notes, or (ii) payment of principal on the Notes is
     accelerated. In the event that such circumstance giving American Capital
     the right to elect sufficient number of Directors to constitute a majority
     of the BOD is cured, such right shall continue for eighteen months after
     the cure; provided that if such voting rights are reinstated because of a
     subsequent occurrence of one or more such events, such voting rights will
     become permanent.

B.   TRANSFERABILITY

     The Notes, or the interest in such securities provided by this Term Sheet,
     will be freely transferable (subject to federal and state securities laws),
     at the Closing or subsequent to the Closing.

C.   CONDITIONS PRECEDENT

     Purchase of the Notes will be subject to various conditions precedent
     customary for transactions of this size and nature, including but not
     limited to:

     1.   Satisfactory completion of business, legal and accounting due
          diligence;

     2.   Execution of definitive agreements, instruments and documents related
          to the Additional Debt satisfactory in form and substance to American
          Capital in its sole discretion;

     3.   The absence of any material adverse change in the business or
          financial condition fof the Company or the capital markets from the
          date of this Term Sheet until the Closing;

     4.   Satisfactory completion of the credit approval process of American
          Capital;

     5.   Key Man Life Insurance of not less than $5,000,000 on John Welker, to
          be assigned to American Capital.

<PAGE>

Numatics, Incorporated                                                    Page 7
--------------------------------------------------------------------------------

     6.   The Company having no less than $42,000,000 of working capital at
          Closing; and

     7.   The Company having no less than $(76,500,000) of equity at Closing.

     8.   Completing an update of the real estate appraisals.

D.   PROCESSING FEE

     1.   EXPENSE DEPOSIT

          The Company shall pay American Capital a $30,000 expense deposit upon
          the commencement of legal documentation.

     2.   CLOSING PROCESSING FEE

          The Company shall pay American Capital a processing fee at Closing
          (the "Closing Processing Fee") of the following percentages less the
          Term Sheet Processing Fee previously paid to American Capital:

          a.   THE TERM A NOTE 3.0%

          b.   THE TERM B NOTE 3.0%

E.   COLLATERAL MONITORING FEE

     The Company shall pay American Capital a Collateral Monitoring fee equal to
     $175,000 per year payable on a monthly basis.

F.   BREAKUP FEE

     If American Capital has approved the financing as presented herein, and the
     Company closes with funds provided by any mezzanine or subordinated debt
     source other than American Capital in connection with the refinancing of
     the Company, including the public or private placement of debt securities,
     within one year of the expiration of this Term Sheet, the Company shall pay
     American Capital a break-up fee of $250,000 which is due and payable at the
     closing of such financing.

G.   EXPENSES

     American Capital shall be reimbursed for all reasonable out-of-pocket
     expenses incurred prior to and at the Closing including, but not limited
     to, legal, environmental (including phase I, compliance audits and phase II
     reports, when indicated), appraisal, consulting, background investigations
     and travel expenses whether or not the transactions contemplated herein are
     consummated. In addition, out-of-pocket expenses such as research,
     telecommunications charges, photocopying, delivery, postage, and other
     administrative expenses will be charged based on American Capital's total
     financing commitment. Total expenses are estimated to be $250,000.

<PAGE>

Numatics, Incorporated                                                    Page 8
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H.   BACKGROUND CHECK

     The following senior managers of the Company will provide, to a background
     investigation firm engaged by American Capital, authorization and
     information for a background check to be conducted on the senior manager:

     1. CEO

     2. CFO

     3. OTHER INDIVIDUALS DETERMINED BY ACAS DURING DUE DILIGENCE

I.   EXCLUSIVITY

     This Term Sheet is confidential and may not be shown or disclosed by the
     Company (or any broker or other agent of the Company) without the prior
     written consent of American Capital other than to the Company's existing
     bank group, LaSalle Business Credit and professional advisors.

J.   PROCEDURAL TERMS

     This Term Sheet is not a commitment to make an investment, rather, upon
     your acceptance of this Term Sheet and payment of the required fees and
     deposit, this Term Sheet will evidence the agreement of American Capital to
     commence in good faith its due diligence and its internal financing
     approval process, and will evidence the Company's agreement to pay and
     reimburse American Capital as provided herein, whether or not any financing
     is ultimately consummated. American Capital will not be under any
     obligation to consummate the proposed financing until such time as the
     foregoing conditions have been satisfied.

<PAGE>

Naumatics, Incorporated                                                   Page 9
--------------------------------------------------------------------------------

K.   TERMINATION

     Except for the obligation of the Company to reimburse American Capital for
     its fees and expenses under Paragraph G and the obligations of the Company
     under the exclusivity provisions of Paragraph I, as provided above (which
     obligations will survive the expiration of this Term Sheet), this Term
     Sheet automatically will expire and be of no further force or effect
     (unless sooner accepted by the Company) as of 5PM CST on October 16, 2001
     (the "Termination Date") or upon the occurrence of any of the following
     events:

     1.   The Company fails to accept this Term Sheet in accordance with the
          procedure set forth above;

     2.   Prior to any such acceptance, American Capital notifies the Company
          that this Term Sheet is withdrawn;

     3.   American Capital or LaSalle Bank notifies the Company that the results
          of its due diligence are unsatisfactory; or

     4.   American Capital or LaSalle Bank notifies the Company that it has not
          obtained internal approfval of the financing upon the terms and
          conditions set forth herein or due to capital restraints.

     Agreed to and accepted by Numatics, Incorporated:

     By:  /s/ Rober P. Robeson
          ---------------------------

     Name:  Robert P. Robeson
            -------------------------

     Title:  Vice President

             ------------------------
     Date:  10-10-01
            -------------------------<PAGE>

November 19th, 2001

Numatics, Incorporated
1450 North Milford Road
Highland, MI  48357-4560

Gentlemen:

LaSalle Business Credit, Inc. ("LaSalle U.S.") is pleased to commit to (i)
making the U.S. Facility (defined below) available to the U.S. Borrowers
(defined below) and (ii) causing LaSalle Business Credit, a division of ABN AMRO
Bank Canada ("LaSalle Canada") to make the Canadian Facility (defined below)
available to the Canadian Borrower (defined below), subject to the terms and
conditions set forth below. For convenience, the U.S. Facility and the Canadian
Facility are collectively referred to as the "Facilities", and LaSalle U.S. and
LaSalle Canada are collectively referred to as "LaSalle".

Borrowers:
---------

     U.S. Borrowers:     Numatics, Incorporated, Micro-Filtration, Inc.,
     ---------------     Numation Inc., Numatech, Inc., Ultra Air Products,
                         Inc., Microsmith, Inc. and Empire Air Systems, Inc.,
                         jointly and severally

     Canadian Borrower:  Numatics Ltd.
     -----------------
                         U.S. Borrowers and Canadian Borrower are collectively
                         referred to as Borrowers.

Purpose:                 To refinance certain existing debt and provide for
--------                 ongoing working capital.

U.S. Facility:           A three year revolving credit facility (funded and
-------------            repayable in U.S. Dollars) in the principal amount of
                         up to Twenty Six Million Dollars (U.S.$26,000,000)
                         based on an advance rate of up to eighty-five percent
                         (85%) against eligible U.S. accounts receivable
                         (assuming dilution of under five percent (5%) of sales)
                         and an advance rate of up to sixty percent (60%) (or
                         forty percent (40%) with respect to inventory at
                         locations that do not use a perpetual inventory
                         accounting system or that do not perform monthly
                         physical counts) against all eligible U.S inventory
                         (computed on a lower of cost

<PAGE>

                              or market value basis), with an inventory sublimit
                              of Fourteen Million Dollars (U.S.$14,000,000), in
                              each case less such reserves as LaSalle U.S.
                              elects, in its sole discretion, to establish from
                              time to time (including without limitation a
                              reserve equal to the amount of the accrued and
                              unpaid interest from time to time owing on the
                              Subordinated Notes, as defined below).

     U.S. Letter of Credit    A Three Million Dollar (U.S.$3,000,000)
     ---------------------    subfacility for the guaranty of documentary and
     Subfacility:             standby letters of credit will be made available
     ------------             to the U.S. Borrower based on a one hundred
                              percent (100%) reserve against availability for
                              standby letters of credit and a forty percent
                              (40%) reserve against available inventory for at
                              sight documentary Letters of Credit covering trade
                              importation of eligible inventory products. If the
                              letters of credit are drawn upon, they shall be
                              funded from the reserved availability under the
                              U.S. Revolving Credit Facility.

Canadian Facility:            A three year revolving credit facility of up to
------------------            Four Million Dollars (U.S.$4,000,000) based on an
                              advance rate of up to eighty-five percent (85%)
                              against eligible Canadian accounts receivable
                              (assuming dilution of under five percent (5%) of
                              sales) and an advance rate of up to sixty percent
                              (60%) (or forty percent (40%) with respect to
                              inventory at locations that do not use a perpetual
                              inventory accounting system or that do not perform
                              monthly physical counts) against all eligible
                              Canadian inventory (computed on a lower of cost or
                              market value basis), with an inventory sublimit of
                              Two Million Dollars (U.S.$2,000,000), in each case
                              less such reserves as LaSalle Canada elects, in
                              its sole discretion, to establish from time to
                              time (including without limitation hedging
                              reserves). Canadian Lender shall make Canadian
                              Loans to Canadian Borrower in U.S. Dollars by way
                              of U.S. Prime Rate (defined below) loans or in
                              Canadian Dollars by way of Canadian Prime Rate
                              (defined below) loans.

                              At the closing Canadian Borrower shall lend Two
                              Million Two Hundred Fifty Thousand Dollars
                              (U.S.$2,250,000) of the proceeds of the Canadian
                              Facility (the "German Inter-company Loan") to
                              Numatics GmbH (the "German Loan Party") from
                              proceeds of the Canadian Facility upon terms
                              acceptable to LaSalle Canada.

     Canadian Letter of       A Four Hundred Thousand Dollar (U.S.$400,000)
     ------------------       sublimit for the guaranty of documentary and
     Credit Subfacility:      standby letters of credit will
     -------------------

                                       -2-

<PAGE>
                              be made available to the Canadian Borrower based
     Credit Subfacility:      on a one hundred percent (100%) reserve against
     ------------------       availability for standby letters of credit and a
                              forty percent (40%) reserve against available
                              inventory for at sight documentary letters of
                              credit covering trade importation of eligible
                              inventory products. If the letters of credit are
                              drawn upon, they shall be funded from the reserved
                              availability under the Canadian Facility.

Interest Rates:               The U.S. Facility shall bear interest at (i)
---------------               LaSalle Bank National Association's publicly
                              announced prime rate in effect from time to time
                              (the "U.S. Prime Rate"), which is not intended to
                              be LaSalle Bank National Association's lowest or
                              most favorable rate in effect at any time or (ii)
                              LIBOR (30, 60 or 90 day) plus two and
                              three-quarters percent (2.75%).

                              The Canadian Facility shall bear interest at (i)
                              the U.S. Prime Rate or (ii) one percent (1%) plus
                              the floating annual rate of interest established
                              from time to time by ABN AMRO as the reference
                              rate for determining interest rates on commercial
                              loans made in Canada in the lawful currency of
                              Canada and designated as its prime rate (the
                              "Canadian Prime Rate"), which is not intended to
                              be ABN AMRO's lowest or most favorable rate in
                              effect at any time and which Canadian prime rate
                              will never be less than the average bid rate for
                              30 day Canadian Dollar bankers acceptances as
                              determined by ABN AMRO plus one and one-half
                              percent (1.50%) per annum.

                              All interest rates shall be calculated on a per
                              annum basis, payable monthly. Borrowers will
                              receive credit for collections one (1) business
                              day after receipt by LaSalle of available funds.
                              Interest will be calculated based on a year of 360
                              days (or 365 days with respect to Canadian Prime
                              Rate loans) for the actual number of days elapsed.

                              The sublimits for letters of credit of
                              U.S./Canadian Facility will be made available at
                              three percent (3.00%) simple interest per annum
                              with a minimum fee of Two Hundred Fifty Dollars
                              (U.S.$250.00) per transaction. All costs and
                              expenses for issuance of the documentary or
                              standby letters of credit shall be the
                              responsibility of the Borrowers.

Closing Fee:                  U.S. Facility:  U.S.$260,000, payable at closing.
-----------

                              Canadian Facility:  U.S.$40,000, payable at
                              closing.

Agent Fee:                    One-tenth percent (0.10%) per year of the maximum
----------                    amount of the Facilities, payable quarterly.

                                       -3-

<PAGE>
Unused Line Fee:               Three-eighths percent (0.375%) of the average
----------------               annualized unused portion of the maximum
                               Facilities, payable monthly.

Prepayment Fee:                2% of the maximum Facilities during Year 1.
--------------

                               1% of the maximum Facilities during Year 2.

                               0.5% of the maximum Facilities during Year 3 and
                               during any renewal period.

Examination Expenses:          Borrowers will be charged for examination person
---------------------          days at LaSalle's then current customary charge
                               (which is currently a per diem cost of Seven
                               Hundred Fifty Dollars (U.S.$750.00)) plus all
                               out-of-pocket expenses.

Security:                      The obligations under the Facilities will be
---------                      secured by a security interest in all existing
                               and future personal property (including without
                               limitation accounts, contract rights, inventory,
                               equipment and general intangibles) and real
                               estate of each Borrower, it being understood that
                               the assets of the Canadian Borrower shall secure
                               only the Canadian Loans. Such security interest
                               shall be a first priority security interest;
                               provided, that with respect to equipment, real
                               estate, intellectual property and general
                               intangibles specifically relating to equipment
                               and real estate, such security interest shall be
                               second only to the security interest securing the
                               ACS Debt (defined below). The German
                               Inter-company Loan shall be secured by a first
                               priority security interest in all existing and
                               future accounts receivable and inventory of the
                               German Loan Party, a junior lien upon all real
                               estate owned by the German Loan Party (second
                               only to the security interest securing the ACS
                               Debt) and, to the extent available, under German
                               law, a junior security interest in all existing
                               and future equipment owned by the German Loan
                               Party (second only to the security interest
                               securing the ACS Debt). All Loans will be
                               cross-defaulted.

Guaranties:                    The Canadian Facility will be guarantied by the
-----------                    U.S. Borrowers.

Participations:                LaSalle shall retain the right to sell all or any
---------------                portion of the Facilities to other institutional
                               lenders.

Conditions Precedent to        LaSalle's obligation to close and fund the loans
-----------------------        shall be subject to the satisfaction, as
Closing:                       determined by LaSalle's in its sole discretion,
--------                       of the following conditions:

                                       -4-

<PAGE>

                    1.   American Capital Strategies, Ltd. ("ACS") shall provide
                         loans to Numatics, Incorporated and its affiliates in
                         the aggregate amount of not less than Thirty-One
                         Million Three Hundred Fifty-Four Thousand Dollars
                         (U.S.$31,354,000) on terms and conditions acceptable to
                         LaSalle.

                    2.   LaSalle and ACS shall have entered into a intercreditor
                         agreement in form and substance satisfactory to LaSalle
                         which shall be consented to by Lender and shall include
                         a resolution of the currently outstanding issues with
                         Borrowers.

                    3.   Satisfactory completion of LaSalle's due diligence.

                    4.   Each Borrower shall have (i) internally prepared profit
                         and loss, balance sheet and cash flow projections for
                         the first 12 months and then annually for a total of
                         two years (to include the balance of 2001, all of 2002
                         and all of 2003) and (ii) an opening balance sheet
                         reflecting valuations for accounts, inventory,
                         machinery, equipment, and real estate, as well as the
                         proposed debt structure and other adjustments all in
                         form, substance, and content satisfactory to LaSalle to
                         assure that (A) the assets of such Borrower, at a fair
                         valuation, exceed the total liabilities, (B) such
                         Borrower is able to pay its debts as they mature, and
                         (C) such Borrower has sufficient capital to conduct
                         business.

                    5.   There shall have been no material adverse change in
                         LaSalle's understanding of the facts and information
                         presented and no material litigation or claims or other
                         material adverse change shall have occurred with
                         respect to Borrowers.

                    6.   Completion of documentation in form and substance
                         satisfactory to LaSalle and their counsel, including
                         perfection of all liens and security interests. Such
                         documentation will include, without limitation, loan
                         and security agreements with Borrowers containing such
                         terms and conditions as LaSalle and its counsel may in
                         its sole discretion, require or deem necessary,
                         including such terms as may be required by LaSalle and
                         its counsel after their due diligence review and all
                         documents and agreements relating thereto including,
                         but not limited to, such statements and reviews by
                         third parties as LaSalle shall require. In the event
                         Borrowers or LaSalle elect not to renew the respective
                         Facilities at the end of the three year term, all
                         obligations of the applicable Borrowers shall

                                       -5-

<PAGE>

                               be due and payable at the end of such term. Such
                               documentation shall also include, without
                               limitation, representations and warranties,
                               affirmative covenants, negative covenants,
                               financial covenants, events of defaults and
                               conditions, in form and substance satisfactory to
                               LaSalle and its counsel, which are no less
                               favorable to LaSalle than those set forth in the
                               most recent drafts of the loan documents
                               pertaining to the Facilities that have been
                               circulated to the Borrowers, except as may be
                               approved by LaSalle in its sole discretion.

                         7.    There shall be excess availability under the
                               Facilities of Four Million Five Hundred Thousand
                               Dollars (U.S.$4,500,000) in the case of the U.S.
                               Facility and Seven Hundred Seventy-Five Thousand
                               Canadian Dollars (Cdn$775,000) in the case of the
                               Canadian Facility, to properly meet all
                               obligations of each such Borrower and to provide
                               for its projected cash requirements, calculated
                               after the initial funding and deeming all debts
                               current on a pro forma basis, including a
                               provision for the repayment of any accounts
                               payable over 60 days past due.

                         8.    U.S. Borrowers will maintain their primary
                               banking relationship (including general checking
                               and lock box accounts) with LaSalle Bank National
                               Association or Standard Federal Bank, and
                               Canadian Borrower will maintain its primary
                               banking relationship (including general checking
                               and lock box accounts) with a bank satisfactory
                               to LaSalle Canada. Normal charges shall be
                               assessed thereon. Although no compensating
                               balance is required, Borrowers may keep monthly
                               balances in order to merit earnings credits which
                               may cover LaSalle's service charges for demand
                               deposit account activities.

                         9.    All future debt owing to stockholders,
                               affiliates, former owners or other similar
                               parties as LaSalle may request are to be
                               subordinated to LaSalle on terms acceptable to
                               LaSalle.

                         10.   LaSalle shall have determined in its discretion
                               that the Facilities shall be senior debt for
                               purposes of the 9-5/8% Senior Subordinated Notes
                               due 2008 issued by Numatics, Incorporated (the
                               "Subordinated Notes").

                                       -6-

<PAGE>

                         11.   LaSalle shall have received such title insurance,
                               ALTA surveys and other documentation relating to
                               all liens on real estate included in the
                               Collateral as LaSalle shall require in its sole
                               discretion.

                         12.   LaSalle shall have received, and approved in its
                               discretion, such tax, lien, judgment, and other
                               searches and investigations with respect to the
                               property and personnel of each Borrower and the
                               German Loan Party.

                         13.   LaSalle shall have received satisfactory legal
                               opinions of Borrowers' and German Loan Party's
                               independent counsel, including without limitation
                               an unqualified opinion of such counsel that the
                               U.S. Facility and the Canadian Facility each
                               constitute Senior Indebtedness for purposes of
                               the Indenture pertaining to the Subordinated
                               Notes.

                         14.   Key Man Life Insurance of not less than Seven
                               Million Five Hundred Thousand Dollars
                               ($7,500,000) on the life of Mr. John H. Welker
                               shall have been assigned to LaSalle.

                         15.   LaSalle shall be satisfied that the Facilities
                               comply in all respects with all applicable
                               solvency, fraudulent conveyance, corporate
                               governments, financial assistance and other
                               applicable laws.

                         16.   All withholding taxes and other taxes, fees, or
                               other costs resulting from any transaction
                               requiring payment by LaSalle will be fully
                               reimbursed by the Borrowers (on a grossed up
                               basis if such reimbursements give rise to any
                               tax, fee, or other costs) excluding any provision
                               for income, intangible or single business taxes.

                         17.   LaSalle shall be satisfied with the form and
                               substance of all third party documents including
                               intercreditor agreements, subordination
                               agreements, and landlord and mortgagee waivers.

All reasonable legal fees and other reasonable out-of-pocket and field
examination expenses incurred by LaSalle in connection with the proposed
financing shall be borne by Borrowers on a joint and several basis, whether or
not the transaction closes. Borrowers understand that prior to finalizing legal
documentation, LaSalle shall require an additional deposit of $130,000

                                       -7-

<PAGE>

to cover such anticipated fees and expenses. In the event that the additional
legal deposit is insufficient to cover the estimated expenses, LaSalle may
require additional deposits.

This letter supersedes all previous agreements relating to this transaction.

This letter is delivered to you on the understanding that neither it nor its
substance shall be disclosed to any third party except for your existing
lenders, accountants and ACS or when required by law or with the written
authorization of LaSalle.

This commitment expires on November 26, 2001 unless accepted by you together
with delivering the deposit referred to above on or before that date. The Loans
committed herein must be disbursed prior to December 15, 2001 or this commitment
shall become null and void unless extended by LaSalle in writing.

Very truly yours,

LASALLE BUSINESS CREDIT, INC.

By /s/ Dale P. Grzenia
  ----------------------------------
Title /s/ Vice President
     -------------------------------

ACCEPTED:

this 19/th/ day of November, 2001.
     ------

NUMATICS, INCORPORATED

By /s/ Robert S. Robeson
  ----------------------------------
Title /s/ Vice President
     -------------------------------

                                       -8-

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