Lawson window

A home owner from Ft Lauderdale says:
I know I need a channel balance of #2940 but trying to find sash clips and a few other related parts for Lawson sh-7500 window
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Bob from SWISCO responded:

There's a few different possibilities for this Top Sash Guide. See if the 18-044, 18-201, or 18-166 match up dimension-wise. Note that for the channel balance, that code only tells you the strength of the balance. Identity is determined by the design of the nylon fittings. 

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