Document:

<PAGE>
                                                                   Exhibit 10.19

NORTEK

RICHARD L. BREADY
Chairman and CEO

October 31, 2003

John Forbis
President and CEO
Kroy Building Products, Inc.
2719 N. Division Avenue
P.O. Box 636
York, NE  68467

Dear John,

     This letter describes the terms and conditions of the key employee
incentive program for the possible sale of Ply Gem Industries, Inc., including
its wholly-owned subsidiaries Variform, Inc., Napco, Inc., Great Lakes Window,
Inc., Kroy Buildings Products, Inc. and Thermal-Gard, Inc., and the business of
the CWD Windows and Doors Division of Broan-NuTone Canada Inc. (collectively
"WDS").

     1. Upon the closing of the sale of WDS, you will be paid by Nortek,
        Inc. a cash incentive bonus of $400,000, payable on or before the 10th
        day after Nortek receives payment from the sale.

     2. Upon the closing of the sale of WDS:  (a) the Class A Options previously
        granted to you pursuant to the Nortek Holdings, Inc. 2002 Stock Option
        Plan shall become fully vested; and (b) the Class A and Class B Options
        previously granted to you shall remain exercisable by you (subject to
        all other conditions of the Plan, including the requirements that a
        minimum Exit Value per share in excess of $92 is achieved and that the
        Kelso entities achieve the 17% Investor Return) regardless of your
        continued employment with WDS after the sale.  A copy of the resolution
        of the Compensation Committee of the Nortek Holdings Board of Directors
        is enclosed together with a copy of the Stock Option Plan.

     3. No payments or arrangements pursuant to paragraphs 1 and 2 above shall
        be made if you are not employed by WDS (for any reason) on the sale date
        or you have not committed the necessary time and effort toward the sale
        of WDS which shall include preparing due diligence materials, preparing
        presentation material, meeting with potential buyers and otherwise
        acting in the best interests of the shareholders of WDS.

      NORTEK, INC., 50 KENNEDY PLAZA, PROVIDENCE, RHODE ISLAND 02903-2360
                         401-751-1600  FAX 401-751-4610
<PAGE>

                                                                               2

     4. In the event the sale of WDS is not completed on or before March 31,
        2004, this letter shall be null, void and have no further affect and any
        obligation or agreement set forth herein shall immediately terminate
        even if WDS is sold at some later date.

     5. This letter should in no way be viewed as any guarantee of continued
        employment with WDS.

     6. All payments shall be subject to any applicable withholdings and any tax
        on such amounts shall be your responsibility.  It is understood that
        payments made pursuant to this letter do not create any employment
        arrangement between any individual and Ply Gem, Nortek or any Nortek
        subsidiary.  Any payments made pursuant to this agreement are not
        counted toward any pension, 401(k) or other benefit plan of WDS or
        Nortek.

     7. This letter sets forth the entire understanding regarding what payment,
        if any, shall be made to you upon the sale of WDS except as may be set
        forth in a written agreement between the parties or contained in written
        benefit plans available to employees or executives generally.

                                                 Very truly yours,

                                                  Richard L. Bready

      NORTEK, INC., 50 KENNEDY PLAZA, PROVIDENCE, RHODE ISLAND 02903-2360
                         401-751-1600  FAX 401-751-4610<PAGE>
                                                                   Exhibit 10.20

                                August __, 1999

John T. Forbis, President
Kroy Building Products
P.O. Box 636
York, NE  68467

                    Re:  Incentive arrangements

Dear Mr. Forbis,

     This letter expresses our arrangement as follows:

    1.  Kroy Building Products, Inc. (the "Company") shall pay you a lump sum
cash bonus (less required withholdings) of $1,000,000 (the "Bonus") if you are
still employed as President and CEO of the Company (or at a higher position with
Nortek or any affiliated company) on the fourth anniversary of the date hereof.
The Bonus would also be paid to you immediately in the event you are terminated
as President of the Company (or such higher position) prior to that time, other
than for cause, or if you resign for good reason.  If you are terminated for
cause, or resign other than for good reason, prior to the fourth anniversary
hereof, the Bonus would not be paid.  As used herein, "cause" means (i) your
engaging in embezzlement, theft, or fraud or (ii) your conviction or pleading
guilty or nolo contendere to any felony.  As used herein, "good reason" means
(i) any assignment by the Company or Nortek to you of any material duties
inconsistent with your position or (ii) any material limitation placed by the
Company or Nortek on the normal powers associated with your position.

     2. You shall be recommended by Nortek management for a Nortek stock option
grant of 15,000 shares.  These shares shall vest at the rate of 5,000 shares per
year, commencing on the first anniversary of the date hereof.

     Please sign below to indicate your agreement.

                                     Very truly yours,

                                     KROY BUILDING PRODUCTS, INC.

                                     By:_______________________________
                                     Its:

Accepted and agreed.

_________________________
John T. Forbis<PAGE>
                                                                    Exhibit 4.01

THIS NOTE IS A GLOBAL NOTE WITHIN THE MEANING OF THE INDENTURE HEREINAFTER
REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE THEREOF.
UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR NOTES IN CERTIFICATED
FORM, THIS NOTE MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITORY TRUST
COMPANY, A NEW YORK CORPORATION ("DTC"), TO A NOMINEE OF DTC OR BY DTC OR ANY
SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR
DEPOSITARY. UNLESS THIS NOTE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF DTC
TO CITIGROUP GLOBAL MARKETS HOLDINGS INC. OR ITS AGENT FOR REGISTRATION OF
TRANSFER, EXCHANGE OR PAYMENT, AND ANY NOTE ISSUED IS REGISTERED IN THE NAME OF
CEDE & CO. OR IN SUCH OTHER NAME AS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF
DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS
REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER
USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS
THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

No. R-1                                      INITIAL PRINCIPAL AMOUNT
CUSIP 173076 70 4                            REPRESENTED $60,000,000
                                             representing 6,000,000 Index LASERS
                                             ($10 per Index LASERS)

                     CITIGROUP GLOBAL MARKETS HOLDINGS INC.
          Index Leading Stockmarket Return Securities (Index LASERS(SM))
            Based Upon the Nikkei 225 Stock Average Due June 19, 2008

      Citigroup Global Markets Holdings Inc., a New York corporation
(hereinafter referred to as the "Company", which term includes any successor
corporation under the Indenture herein referred to), for value received and on
condition that this Note is not redeemed by the Company prior to June 19, 2008
(the "Stated Maturity Date"), hereby promises to pay to CEDE & CO., or its
registered assigns, the Maturity Payment (as defined below), on the Stated
Maturity Date. This Note will not bear interest, is not subject to any sinking
fund, is not subject to redemption at the option of the holder thereof prior to
the Stated Maturity Date, and is not subject to the defeasance provisions of the
Indenture.

      Payment of the Maturity Payment with respect to this Note shall be made
upon presentation and surrender of this Note at the corporate trust office of
the Trustee in the Borough of Manhattan, The City and State of New York, in such
coin or currency of the United States as at the time of payment is legal tender
for payment of public and private debts.

      This Note is one of the series of 6,000,000 Index LeAding StockmarkEt
Return Securities (Index LASERS(SM)) Based Upon the Nikkei 225 Stock Average
(the "Index") Due June 19, 2008 (the "Index LASERS").

<PAGE>

INTEREST

      The Index LASERS do not bear interest. No payments on the Index LASERS
will be made until the Stated Maturity Date.

PAYMENT AT MATURITY

      On the Stated Maturity Date, holders of the Index LASERS will receive for
each Index LASERS the Maturity Payment described below.

DETERMINATION OF THE MATURITY PAYMENT

      The Maturity Payment for each Index LASERS equals the sum of the initial
principal amount of $10 per Index LASERS plus the Index Return Amount.

      The "Index Return Amount" is calculated as follows:

      -     If the Index Return is positive, the Index Return Amount will equal
            the product of:

                  $10 * Upside Participation Rate * Index Return

      -     If the Index Return is negative and

            - the value of the Nikkei 225 Stock Average on any Index Business
      Day after June 16, 2004 up to and including the third Index Business Day
      before the Stated Maturity Date (whether intra-day or at the close of
      trading on any Index Business Day) is less than or equal to 7,567.12, then
      the Index Return Amount will equal the product of:

                  $10 * Index Return

            - the value of the Nikkei 225 Stock Average on any Index Business
      Day after June 16, 2004 up to and including the third Index Business Day
      before the Stated Maturity Date (whether intra-day or at the close of
      trading on any Index Business Day) is not less than or equal to 7,567.12,
      then the Index Return Amount will be zero.

      -     If the Index Return is zero, the Index Return Amount will be zero.

      The "Index Return" equals:

                          Ending Value - Starting Value
                          -----------------------------
                                 Starting Value

      The "Upside Participation Rate" is 127%.

      The "Starting Value" is 11,641.72, the closing value of the Index on June
16, 2004.

                                       2
<PAGE>

      The "Ending Value" will be the closing value of the Index on the third
Index Business Day before the Stated Maturity Date.

      If no value (including a closing value) of the Index is available on any
date of determination because of a Market Disruption Event or otherwise, unless
deferred by the calculation agent as described below, the value of the Index
will be the arithmetic mean, as determined by the calculation agent, of the
value of the Index obtained from as many dealers in equity securities (which may
include Citigroup Global Markets Inc. or any of the Company's other subsidiaries
or affiliates), but not exceeding three such dealers, as will make such value
available to the calculation agent. The determination of the value of the Index
by the calculation agent in the event no such closing value is available may be
deferred by the calculation agent for up to two consecutive Index Business Days
on which a Market Disruption Event is occurring.

      An "Index Business Day" means a day, as determined by the calculation
agent, on which the Index or any successor index is calculated and published and
on which securities comprising more than 80% of the value of the Index on such
day are capable of being traded on their relevant exchanges during the one-half
hour before the determination of the closing value of the Index. All
determinations made by the calculation agent will be at the sole discretion of
the calculation agent and will be conclusive for all purposes and binding on the
Company and the beneficial owners of the Index LASERS, absent manifest error.

      A "Market Disruption Event" means, as determined by the calculation agent
in its sole discretion, the occurrence or existence of any suspension of or
limitation imposed on trading (by reason of movements in price exceeding limits
permitted by any relevant exchange or market or otherwise) of, or the
unavailability, through a recognized system of public dissemination of
transaction information, for a period longer than two hours, or during the
one-half hour period preceding the close of trading, on the applicable exchange,
of accurate price, volume or related information in respect of (a) stocks which
then comprise 20% or more of the value of the Index or any successor index, (b)
any options or futures contracts, or any options on such futures contracts
relating to the Index or any successor index, or (c) any options or futures
contracts relating to stocks which then comprise 20% or more of the value of the
value of the Index or any successor index on any exchange or market if, in each
case, in the determination of the calculation agent, any such suspension,
limitation or unavailability is material. For the purpose of determining whether
a Market Disruption Event exists at any time, if trading in a security included
in the Index is materially suspended or materially limited at that time, then
the relevant percentage contribution of that security to the value of the Index
will be based on a comparison of the portion of the value of the Index
attributable to that security relative to the overall value of the Index, in
each case immediately before that suspension or limitation.

DISCONTINUANCE OF THE NIKKEI 225 STOCK AVERAGE

      If Nihon Keizai Shimbun, Inc. ("NKS") discontinues publication of the
Index or if it or another entity publishes a successor or substitute index that
the calculation agent determines, in its

                                       3
<PAGE>

sole discretion, to be comparable to the Index, then the value of the Index will
be determined by reference to the value of that index, which is referred to as a
"successor index."

      Upon any selection by the calculation agent of a successor index, the
calculation agent will cause notice to be furnished to the Company and the
Trustee, who will provide notice of the selection of the successor index to the
registered holders of the Index LASERS.

      If NKS discontinues publication of the Index and a successor index is not
selected by the calculation agent or is no longer published on any date of
determination of the value of the index, the value to be substituted for the
Index for that date will be a value computed by the calculation agent for that
date in accordance with the procedures last used to calculate the Index prior to
any such discontinuance.

      If NKS discontinues publication of the Index prior to the determination of
the Index Return Amount and the calculation agent determines that no successor
index is available at that time, then on each Index Business Day until the
earlier to occur of (a) the determination of the Index Return Amount and (b) a
determination by the calculation agent that a successor index is available, the
calculation agent will determine the value that is to be used in computing the
value of the Index as described in the preceding paragraph. The calculation
agent will cause notice of those daily closing values to be published not less
often than once each month in The Wall Street Journal (or another newspaper of
general circulation), and arrange for information with respect to those values
to be made available by telephone.

      If a successor index is selected or the calculation agent calculates a
value as a substitute for the Index as described above, the successor index or
value will be substituted for the Index for all purposes, including for purposes
of determining whether an Index Business Day or Market Disruption Event occurs.

      All determinations made by the calculation agent will be at the sole
discretion of the calculation agent and will be conclusive for all purposes and
binding on the Company and the beneficial owners of the Index LASERS, absent
manifest error.

ALTERATION OF METHOD OF CALCULATION

      If at any time the method of calculating the Index or a successor index is
changed in any material respect, or if the Index or a successor index is in any
other way modified so that the value of the Index or the successor index does
not, in the opinion of the calculation agent, fairly represent the value of that
index had the changes or modifications not been made, then, from and after that
time, the calculation agent will, at the close of business in New York, New
York, make those adjustments as, in the good faith judgment of the calculation
agent, may be necessary in order to arrive at a calculation of a value of a
stock index comparable to the Index or the successor index as if the changes or
modifications had not been made, and calculate the value of the index with
reference to the Index or the successor index. Accordingly, if the method of
calculating the Index or the successor index is modified so that the value of
the Index or the successor index is a fraction or a multiple of what it would
have been if it had not been modified, then the calculation agent will adjust
that index in order to arrive at a value of the index as if it had not been
modified.

                                       4
<PAGE>

GENERAL

      This Note is one of a duly authorized issue of debt securities of the
Company (the "Debt Securities"), issued and to be issued in one or more series
under a Senior Debt Indenture, dated as of October 27, 1993, as supplemented by
a First Supplemental Indenture, dated as of November 28, 1997, a Second
Supplemental Indenture, dated as of July 1, 1999, and as further supplemented
from time to time (the "Indenture"), between the Company and The Bank of New
York, as Trustee (the "Trustee", which term includes any successor trustee under
the Indenture), to which Indenture reference is hereby made for a statement of
the respective rights, limitations of rights, duties and immunities thereunder
of the Company, the Trustee and the holders of the Index LASERS, and the terms
upon which the Index LASERS are, and are to be, authenticated and delivered.

      If an Event of Default with respect to the Index LASERS shall have
occurred and be continuing, the principal of the Index LASERS may be declared
due and payable in the manner and with the effect provided in the Indenture. In
such case, the amount declared due and payable upon any acceleration permitted
by the Indenture will be determined by the calculation agent and will be equal
to, with respect to this Note, the Maturity Payment calculated as though the
Stated Maturity Date of this Note were the date of early repayment. In case of
default at Maturity of this Note, this Note shall bear interest, payable upon
demand of the beneficial owners of this Note in accordance with the terms
hereof, from and after Maturity through the date when payment of such amount has
been made or duly provided for, at the rate of 4.50% per annum on the unpaid
amount due.

      The Indenture permits, with certain exceptions as therein provided, the
amendment thereof and the modification of the rights and obligations of the
Company and the rights of the holders of the Debt Securities of each series to
be affected under the Indenture at any time by the Company and a majority in
aggregate principal amount of the Debt Securities at the time Outstanding of
each series affected thereby. The Indenture also contains provisions permitting
the holders of specified percentages in aggregate principal amount of the Debt
Securities of any series at the time Outstanding, on behalf of the holders of
all Debt Securities of such series, to waive compliance by the Company with
certain provisions of the Indenture and certain past defaults under the
Indenture and their consequences. Any such consent or waiver by the holder of
this Note shall be conclusive and binding upon such holder and upon all future
holders of this Note and of any Note issued upon the registration of transfer
hereof or in exchange herefor or in lieu hereof, whether or not notation of such
consent or waiver is made upon this Note.

      The holder of this Note may not enforce such holder's rights pursuant to
the Indenture or the Notes except as provided in the Indenture. No reference
herein to the Indenture and no provision of this Note or of the Indenture shall
alter or impair the obligation of the Company to pay the Maturity Payment with
respect to this Note, and to pay any interest on any overdue amount thereof at
the time, place and rate, and in the coin or currency, herein prescribed.

      All terms used in this Note which are defined in the Indenture but not in
this Note shall have the meanings assigned to them in the Indenture.

                                       5
<PAGE>

      Unless the certificate of authentication hereon has been executed by the
Trustee by manual signature, this Note shall not be entitled to any benefit
under the Indenture or be valid or obligatory for any purposes.

                                       6
<PAGE>

      IN WITNESS WHEREOF, the Company has caused this instrument to be duly
executed under its corporate seal.

                                       CITIGROUP GLOBAL MARKETS HOLDINGS INC.

                                       By:  /s/ Mark I. Kleinman
                                           -------------------------------------
                                            Name: Mark I. Kleinman
                                            Title: Executive Vice President and
                                                    Treasurer

Corporate Seal
Attest:

By:   /s/ Douglas C. Turnbull
   ----------------------------------
     Name: Douglas C. Turnbull
     Title: Assistant Secretary

Dated: June 21, 2004

CERTIFICATE OF AUTHENTICATION
   This is one of the Notes referred
   to in the within-mentioned Indenture.

The Bank of New York,
as Trustee

By:     /s/ Geovanni Barris
      -------------------------------
     Authorized Signatory

                                       7

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00068-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00068-of-00352.parquet"}], [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00068-of-00352.parquet"}]]