Channel balance
Hello,
With this combination of attachments, you could have either an S380-23 or S385-23 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 to locate the stamp on your balances metal channel to choose the correct spring strength option for your replacements.
Thank you and let us know if you have any other questions or concerns.
The most important thing is that it's greater than 1". Sometimes these shoes wear down from use over time, so 1-3/32" can become 1-1/16". But so long as it's greater than 1", it's a safe bet in my estimate that the Series 385 is what you need.