Casey from SWISCO responded:
October 4, 2023
Hello, I would recommend starting by removing your channel balance from the window to compare to the specifications of the S765-30. If it's a match, the 29 3 stamped on your metal channel indicates that you will need 29-3 strength options for your replacement balances. Take a look and thanks for posting! How to measure the length of the Series 765 channel balance.
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