Emily from SWISCO responded:
May 5, 2022
Hello, Joe. Depending on the depth of your bottom shoe, you have either our S380-27 or S385-27 channel balance. Our Series 380 has a 1" deep shoe while the Series 385 has a 1-3/32" deep shoe. Take a look at the image below to determine which one you'll need. You'll also need to choose the 2630 spring strength option. Comparison of the S380 and S385 balance shoes.
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