Paul from SWISCO responded:
March 6, 2018
Alenco has been known to use a few different kinds of balances. Your best bet is to carefully compare the nylon top and bottom ends to see if they match. I see you were looking at our S385-28, which comes with the 19-005 top and 15-004 bottom. As long as the style and measurements of your nylon ends match the 19-005 and 15-004, you should be fine.
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