I'm needing a couple of new window balances, but these are the only identifying numbers/letters on my current ones. Can't seem to find them online.
Bob from SWISCO responded:
December 30, 2020
See our S380-27 or S385-27. The only difference between these two balances is the depth of the bottom nylon shoe, so compare both with your old hardware to see what matches best. For a new stamp option, choose 2630.