Jasmine from SWISCO responded:
April 25, 2023
Thanks for reaching out! Your spiral balances should be the S600-30 based on the measurements provided. You'll need to select the red tip. This spiral balance is compatible with a few of the different pivot shoes we carry. The most most common are the 15-015 (17/32" thick), 15-048 (1/2" thick), and the 15-047 (9/16" thick). To determine which of these is the best replacement for your window, you'll need to carefully review and compare the measurements. The height and width of each of these shoes is the same. Dimensions for 15-015
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