Document:

eWeb21 Corp.
             (INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE)

                                  COMMON STOCK

This certifies that

is the registered owner of

FULLY PAID AND NON-ASSESSABLE SHARES$.001 PAR VALUE EACH OF THE COMMON STOCK OF

                                  eWeb21 Corp.

transferable  on the books of the  Corporation  in person  or by  attorney  upon
surrender of this  Certificate  duly endorsed or assigned.  This Certificate and
the shares  represented hereby are subject to the laws of the State of Delaware,
and to the Certificate of Incorporation  and By-laws of the Corporation,  as now
or hereafter amended.  This certificate is not valid unless countersigned by the
Transfer Agent

     WITNESS the facsimile seal of the Corporation and the facsimile  signatures
of its duly authorized officers.

Dated: ----------------

                                  eWeb21 Corp.
/s/Hyo-Syng Choi                 CORPORATE SEAL              /s/Sea-Hyong Oh
---------------------                1972                    -----------------
 Secretary                         DELAWARE                    President

                                                                  Countersigned:
                                          Olde Monmouth Stock Transfer Co., Inc.
                                                             77 Memorial Parkway
                                            Atlantic Highlands, New Jersey 07716
                                                                  Transfer Agent

                                                    ----------------------------
                                                         AUTHORIZED SIGNATURE

<PAGE>

     The following  abbreviations,  when used in the  inscription on the face of
this  certificate,  shall be  construed  as though they were written out in full
according to applicable laws or regulations:

TEN COM - as tenants in common
TEN ENT - as tenants by the  entireties
JT TEN -  as joint tenants with right of
          survivorship and not as tenants
          in common and not as community property

UNIFORM GIFTS TO MINORS ACT

( Custodian)                       (Minor)
under the Uniform Gifts of Minors Act of  the State of ------------------

FOR VALUE RECEIVED, the undersigned hereby sells, assigns and transfers unto:

Please insert social security or other identifying number: -----------------

(Insert name and address, including zip code):

----------------------------------------------------

----------------------------------------------------

--------------------------------------------- shares

of the Common Stock represented by the within Certificate and does hereby
irrevocably constitute and appoint

----------------------------------------------------

to transfer  the said shares on the books of the within named  Corporation  with
full power of substitution in the premises.

DATED: -------------                  ---------------------------------------

NOTICE:  The signature to this assignment must correspond with the name as it is
written upon the face of the Certificate in every particular  without alteration
or enlargement or any change whatever.

SIGNATURE GUARANTEE:Exhibit 10.6.1

                        McNAB COMMERCE CENTER ASSOCIATES
                             2005 Cypress Creek Road
                            Ft. Lauderdale, FL 33309

November 12, 1999

Technical Chemicals & Products, Inc.
3361 SW 15 Street
Pompano Beach, FL  33069

Attn:  Jack Aronowitz, President

Re:      3245-3361 SW 15 Street, Pompano Beach, FL

Dear Mr. Aronowitz:

This letter is to confirm our understanding which is as follows:

We agree that the term of the Original Lease dated October 14, 1992, together
with addendum thereto, for the above referenced premises, remain extended until
October 31, 2003, with an option to further extend to October 31, 2006, provided
notice is given by you to us by October 31, 2002.

We agree that you will lease approximately an additional 6,800 square feet
located at 3265 SW 15 Street commencing on June 1, 2000. The base rent for the
additional space will increase the base rent you are currently paying by
$4,194.92 per month. The total initial monthly base rent for the combined space
will now be $22,128.32. Anticipating the scheduled increase in rent on January
1, 2000. The above rents will be adjusted as follows:

             Monthly base rent for presently occupied space:     $18,471.46
             Monthly base rent for additional space:               4,316.51
             New monthly base rent:                              $22,787.97

Your share of the additional rent shall be computed on 100% of the total
expenses for the entire premises.

The term for this additional space will be the same as for the referenced space,
terminating on October 31, 2003. You agree to accept the space in "as-is"
condition.

It is understood and agreed that this additional space does not include any
additional parking spaces. Twenty five designated parking spaces will remain to
be used in a manner determined in the sole discretion of the landlord.

We will arrange for GFA International to perform an Environmental Site Screening
Evaluation on the new additional space at the premises to insure that no
recognized adverse environmental condition exists in connection with subject
property.
<PAGE>

In the event that the space becomes available sooner than June 1, 2000, then, in
that event, you agree to take possession at the earlier date and commence rent
payments on the date of availability.

In the event that we are unable to deliver possession of the space for any
reason whatsoever, the rental reserved to be paid herein for the space shall be
abated pending the making available of the space. The validity or terms of the
lease shall not be affected by such an event.

It is understood that there was no broker involved in this space and that no
commissions or fees or expense will be involved.

All other terms and conditions of the lease apply to this space as well as all
terms and conditions of the lease remaining in full force and effect for the
referenced space.

Please indicate your acceptance in the space provided below.

Very truly yours,

McNAB COMMERCE CENTER ASSOCIATES

/s/
-----------------------------------------------------------------------------

      WITNESS:          /s/
                        -----------------------------------------------------

      WITNESS:          /s/
                        -----------------------------------------------------

AGREED AND ACCEPTED:

TECHNICAL CHEMICALS & PRODUCTS, INC.

/s/
-----------------------------------------------------------------------------

      WITNESS:             /s/
                           --------------------------------------------------

      WITNESS:             /s/
                           --------------------------------------------------

      DATE:                12/22/99
                           --------------------------------------------------<PAGE>

                                   Exhibit 4.3

                                  eSPEED, INC.

                    NONQUALIFIED EMPLOYEE STOCK PURCHASE PLAN

         1. Purpose. The purpose of the eSpeed, Inc. Nonqualified Employee Stock
Purchase Plan (the "Plan") is to provide eligible employees of eSpeed, Inc. (the
"Company") and its Affiliates who are not eligible to participate in the eSpeed,
Inc. Employee Stock Purchase Plan (the "Qualified Plan"), or wish to participate
to a greater extent than permitted thereunder, an opportunity to purchase Class
A common stock of the Company. The Board of Directors of the Company (the
"Board") believes that employee participation in ownership will be to the mutual
benefit of the employees and the Company. The Plan is not intended to constitute
an "employee stock purchase plan" within the meaning of section 423 of the
Internal Revenue Code of 1986, as amended (the "Code").

         2. Definitions. Terms not otherwise defined herein shall have the
meaning set forth below:

         (a) "Affiliate" means any entity that directly or indirectly controls,
is controlled by or is under common control with the Company, and has, with the
permission of the Board, become a participating employer in the Plan.

         (b) "CFLP" means Cantor Fitzgerald, L.P., and its affiliates, other
than the Company and its direct or indirect subsidiaries.

         (c) "Committee" means the Board or a committee appointed by the Board
to administer the Plan.

         (d) "Compensation" means, with respect to any paycheck, either (i) the
portion thereof representing the gross remuneration paid for services rendered,
net of applicable withholdings and deductions or (ii) the portion thereof
representing base salary or regular wages, net of applicable withholdings and
deductions, as determined by the Committee.

         (e) "Custodian" shall mean the independent stock brokerage firm or
other custodian designated by the Committee to accept and hold, on behalf of
Participants, Shares purchased under the Plan.

         (f) "Eligible Employee" means an Employee who is eligible to
participate pursuant to Section 4(a).

         (g) "Employee" means each individual who is an employee of the Company
or an Affiliate of the Company for purposes of payroll tax withholding;
provided, however, that the term Employee shall not include any individual who
is on an approved leave of absence that has

<PAGE>

exceeded 90 days and whose right to reemployment is not guaranteed either by
statute or by contract unless the Committee determines otherwise, in its sole
discretion.

         (h) "Enrollment Form" means the document prescribed by the Committee
pursuant to which an Eligible Employee has enrolled to be a Participant.

          (i) "Market Value" means the last sale price of a Share or, if
unavailable, the average of the closing bid and asked prices per Share at the
end of regular trading on such date (or, if there was no trading or quotation in
the Shares on such date, on the next preceding date on which there was trading
or quotation) as provided by the national securities exchange or interdealer
quotation system on which the Shares are listed or quoted.

         (j) "Offering" means each separate offering of Shares under the Plan
that occurs during each Offering Period.

         (k) "Offering Date" means the date on which each Offering Period is to
commence, as determined by the Committee.

         (l) "Offering Period" means a period of such duration as determined by
the Committee. Offering Periods may run consecutively or may overlap, as
determined by the Committee.

         (m) "Participant" means each Eligible Employee who elects to
participate in the Plan.

         (n) "Purchase Date" means the last day of each Offering Period, and
such interim dates, as determined by the Committee, on which Shares are
purchased pursuant to the Plan.

         (o) "Purchase Price" shall mean the price at which a Share shall be
purchased on each Purchase Date, the method for determining which shall be set
in advance of each Offering by the Committee; provided, however, that the
Purchase Price shall not be less than 85% of the lower of (i) the Market Value
on the Offering Date, or (ii) the Market Value on the Purchase Date.

         (p) "Share" means a share of Class A common stock of the Company, par
value $0.01 per share.

         (q) "Stockholder Account" means the account maintained by the Custodian
to record the number of Shares allocated to each Participant under the Plan.

         (r) "Stock Purchase Account" means a noninterest bearing bookkeeping
entry established by the Company or an Affiliate, which shall record all amounts
deducted from a Participant's Compensation for the purpose of purchasing Shares
for such Participant under the Plan, reduced by all amounts applied to the
purchase of Shares for such Participant under the Plan. Neither the Company nor
any Affiliate shall be required to segregate or set aside any amounts so
deducted, and such bookkeeping entry shall not represent an interest in any
assets of the Company. All deducted amounts shall remain part of the general
assets of the Company or an Affiliate until they are applied to purchase Shares
under the Plan, and until such time may be used by the Company or an Affiliate
for any corporate purpose.

                                       2
<PAGE>

         3.  Administration.

         (a) The Plan shall be administered by the Committee, which shall have
the authority and power to adopt, construe and enforce rules and regulations not
inconsistent with the provisions of the Plan. Any action of the Committee with
respect to the Plan shall be final, conclusive and binding on all persons,
including any Affiliate of the Company, Participants and any person claiming any
rights under the Plan from or through any Participant, except to the extent the
Committee may subsequently modify, or take further action not consistent with,
its prior action. The Committee may delegate to officers or managers of the
Company or any Affiliate the authority, subject to such terms as the Committee
shall determine, to perform such functions as the Committee may determine, to
the extent permitted under applicable law.

         (b) Each member of the Committee shall be entitled to, in good faith,
rely or act upon any report or other information furnished to him by any officer
or other employee of the Company or any of its Affiliates, the Company's
independent certified public accountants or any compensation consultant, legal
counsel or other professional retained by the Company or any of its Affiliates
to assist in the administration of the Plan. No member of the Committee, or any
officer or employee of the Company or any of its Affiliates acting on behalf of
the Committee, shall be personally liable for any action, determination or
interpretation taken or made in good faith with respect to the Plan, and each
member of the Committee and any officer or employee of the Company or any of its
Affiliates acting on its behalf shall, to the extent permitted by law, be fully
indemnified and protected by his employer with respect to any such action,
determination or interpretation.

         (c) The Committee shall designate a Custodian to accept and hold, on
behalf of Participants, Shares purchased under the Plan and allocated to their
Stockholder Accounts.

         4.  Eligibility and Participation.

         (a) During each Offering, Employees of the Company and each Affiliate
employed on the Offering Date shall be eligible to participate in the Plan;
provided, however, that (i) Employees who are also eligible to participate in an
offering under the Qualified Plan that coincides with such Offering must first
elect to participate in the offering under the Qualified Plan to the maximum
extent permitted therein, and (ii) Employees described in section 423(b)(4) of
the Code may be excluded from participation in any Offering.

         (b) Each Eligible Employee may elect to participate in an Offering by
completing an Enrollment Form at such time in advance of the commencement of the
Offering as determined by the Committee.

         (c) Unless otherwise determined by the Committee, the purchase of
Shares under the Plan shall be funded solely through payroll deductions
accumulated during the Offering Period. In an Enrollment Form, an Eligible
Employee shall designate the percentage or amount of Compensation to be deducted
from each paycheck, subject to such maximum amount as may be set by the
Committee. Such payroll deductions shall be credited to the Participant's Stock

                                       3
<PAGE>

Purchase Account. Increases or decreases to a Participant's rate of payroll
deduction during an Offering Period may be permitted based on uniform rules to
be established by the Committee.

         (d) Any Participant may voluntarily withdraw from the Plan by filing a
notice of withdrawal with the Committee at such time in advance as the Committee
may specify. Within a reasonable time following such withdrawal, there shall be
paid to the Participant the amount, if any, standing to his credit in his Stock
Purchase Account.

         (e) If a Participant ceases to be employed by the Company or an
Affiliate, participation in the Plan shall cease and, unless otherwise
determined by the Committee, the entire amount, if any, standing to the
Participant's credit in his Stock Purchase Account shall be refunded to him. If
a Participant remains employed by the Company or an Affiliate but ceases to be
an Eligible Employee, unless otherwise determined by the Committee, he may
continue to participate in the Plan through the end of the Offering Period in
which such cessation occurs, but may participate thereafter only pursuant to
Section 4(a).

         5. Purchase of Shares. On any Purchase Date, there shall be purchased
on behalf of each Participant that number of Shares which equals the amount then
credited to each Participant's Stock Purchase Account divided by the Purchase
Price. Upon or as soon as soon as practicable following the Purchase Date, such
number of Shares shall be allocated to each Participant's Stockholder Account.
Shares may be purchased from the Company, any Affiliate or in the open market.

         6. Restrictions on Shares. Prior to the time that Shares are allocated
to a Participant's Stockholder Account, none of the rights or privileges of a
stockholder of the Company shall inure to the Participant with respect to such
Shares. The Committee shall have the authority to determine the restrictions, if
any, to which Shares shall be subject (including lock-ups and other transfer
restrictions), and may condition the delivery of the Shares upon the execution
by the Participant of any agreement providing for such restrictions and/or
require that the Shares be held in a brokerage or custodial account established
with a broker or other custodian selected by the Committee in order to enforce
such restrictions.

         7.  Adjustments.

         (a) In the event that the Committee shall determine that any
recapitalization, forward or reverse split, reorganization, merger,
consolidation, spin-off, combination, repurchase or exchange of Shares or other
securities, stock dividend or other special, large and non-recurring dividend or
distribution (whether in the form of cash, securities or other property),
liquidation, dissolution, or other similar corporate transaction or event,
affects the Shares such that an adjustment is appropriate in order to prevent
dilution or enlargement of the rights of Participants under the Plan, then the
Committee shall, in such manner as it may deem equitable, adjust the kind of
Shares reserved for purchase under the Plan, and/or the calculation of the
Purchase Price.

         (b) If the Shares shall cease for any reason to be listed on any
nationally recognized stock exchange or quotation system, the Plan and any
Offering hereunder shall thereupon

                                       4
<PAGE>

terminate, and the balance then standing to the credit of each Participant in
his Stock Purchase Account shall be returned to him.

         8. General Provisions.

         (a) Compliance With Laws and Obligations. The Company shall not be
obligated to issue or deliver Shares under the Plan in a transaction subject to
the requirements of any applicable securities law, any requirement under any
listing agreement between the Company and any national securities exchange or
automated quotation system or any other law, regulation or contractual
obligation of the Company or any Affiliate of the Company until the Company or
such Affiliate is satisfied that such laws, regulations and other obligations
have been complied with in full. Certificates representing Shares issued under
the Plan will be subject to such stop-transfer orders and other restrictions as
may be applicable under such laws, regulations and other obligations of the
Company or any Affiliate of the Company, including any requirement that a legend
or legends be placed thereon.

         (b) Nonalienation. The right to purchase Shares under the Plan is
personal to the Participant, is exercisable only by the Participant during his
lifetime except as hereinafter set forth, and may not be assigned or otherwise
transferred by the Participant. Notwithstanding the foregoing, there shall be
delivered to the executor, administrator or other personal representative of a
deceased Participant such residual balance as may remain in the Participant's
Stock Purchase Account as of the date the Participant's death occurs. However,
such representative shall be bound by the terms and conditions of the Plan as if
such representative were a Participant.

         (c) Taxes. The Company and any Affiliate by whom a Participant is
employed shall be entitled to require any Participant to remit, through payroll
withholding, withholding of Shares otherwise deliverable, requiring a sale of
such Shares, or otherwise, any tax that it determines it is so obligated to
collect with respect to the purchase of Shares or their subsequent sale, and the
Committee shall institute such procedures as shall insure the collection of such
taxes.

         (d) No Right to Continued Employment or Service. Neither the Plan nor
any action taken hereunder shall be construed as giving any employee, director
or other person the right to be retained in the employ or service of the Company
or any Affiliate nor shall it interfere in any way with the right of the Company
or any Affiliate to terminate any Employee's employment or other person's
service at any time or with the right of CFLP to terminate any of its partners.

         (e) Changes to the Plan. The Board may amend, alter, suspend,
discontinue or terminate the Plan without the consent of stockholders or
Participants, except that any such action shall be subject to the approval of
the Company's stockholders at or before the next annual meeting of stockholders
for which the record date is after such Board action if such stockholder
approval is required by any federal or state law or regulation or the rules of
any stock exchange or automated quotation system on which the Shares may then be
listed or quoted, and the Board may otherwise, in its discretion, determine to
submit other such changes to the Plan to stockholders for approval; provided,
however, that, without the consent of an affected Participant, no such action
may materially impair the rights of such Participant with respect to any Shares
previously purchased by the Participant. Upon termination of the Plan, any
amounts then credited to a

                                       5
<PAGE>

Participant's Stock Purchase Account shall be returned to the Participant. The
Board or the Committee shall also have the authority to establish separate
sub-plans under the Plan with respect to Participants resident in a particular
jurisdiction (the terms of which shall not be inconsistent with those of the
Plan) if necessary or desirable to comply with the applicable laws of such
jurisdiction.

         (f) Nonexclusivity of the Plan. Neither the adoption of the Plan by the
Board nor any submission of the Plan or amendments thereto to the stockholders
of the Company for approval shall be construed as creating any limitations on
the power of the Board to adopt such other compensatory arrangements as it may
deem desirable, including, without limitation, the granting of stock options or
purchase rights otherwise than under the Plan, and such arrangements may be
either applicable generally or only in specific cases.

         (g) Governing Law. The validity, construction and effect of the Plan,
and any rules and regulations relating to the Plan, shall be determined in
accordance with the laws of the State of Delaware, without giving effect to
principles of conflicts of laws, and applicable federal law.

         (h) Expenses. Expenses of the Plan related to participation by
Employees of CFLP shall be borne by CFLP and expenses related to participation
by Employees of the Company and its subsidiaries shall be borne by the Company.
CFLP shall fulfill the obligation to deliver the number of Shares required to be
purchased pursuant to Section 5 on behalf of each CFLP Employee from either
Shares that it owns or Shares acquired in the open market. The Company shall
fulfill the obligation to deliver the number of Shares required to be purchased
pursuant to Section 5 on behalf of each Employee of the Company and its
subsidiaries from either newly issued Shares or Shares acquired in the open
market.

         (i) Currency. The Purchase Price shall be denominated in U.S. dollars.
Any amounts credited to a Participant's Stock Purchase Account that are
denominated in any other currency shall be converted to U.S. dollars at such
times and using such exchange rates as determined under procedures established
by the Committee.

                                       6

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