Wimdow channel balance 26-3 EL5 CMC 43

With this combination of attachments, you could have either an S380-27 or S385-27 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. You'll also need 2630 spring strength options for your replacement balances.

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Comparison of the S378, S380 and S385 balance shoes.