Casey from SWISCO responded:
November 15, 2019
With this combination of attachments, you could have either an S380 or S385 channel balance. You need to measure as shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment. Once you choose the correct balance, choose the length of your metal channel and the correct stamp option based on the stamp on your balance. 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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