Jasmine from SWISCO responded:
September 18, 2023
Hey there, Thanks for writing in! Your balances look like they could be either the S380-37 with a 1" shoe or the S385-37 with a 1-3/32" shoe. These have a 1/2" channel width and a 37" length. To determine which series is needed for your window, look over the dimensions from the diagram below to confirm the depth of your bottom shoe. Let me know if it does not match either measurement. You'll need to select the 3640 stamp. Comparison of the S380 and S385 balance shoes.
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