channel balance 2740x

A professional from Walnut Creek CA says:
I have a customer that needs four of these. One is missing and the other three are all broken in different ways. Theres also a picture of a part that is screwed to the top of the sliding window frame. some or missing or broken. Id like to replace every part that I can. Thanks for the help.
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Bob from SWISCO responded:

See either our S351-28 or S390-28. The only difference between these two balances is the depth of the bottom nylon shoe, or the heel-to-toe measurement, so compare both with your old hardware to see what matches best. You will need a stamp option of 2740. For a new Top Sash Guide, see if the 18-008 matches up. 

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