Casey from SWISCO responded:
March 18, 2022
Hello, With this combination of attachments, you could have either an S380 or S385 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment. As for your top sash guide, see our 18-008. Thank you and let us know if you have any other questions or concerns. Comparison of the S380 and S385 balance shoes.
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