Searching for apex extended block and tackle balance

Hello,

It looks like your balance has wings on both top and bottom attachments. With this combination of attachments, you could have either an S380-17 or S385-17 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. You'll also need a 1650 spring strength option for your balances based on the stamp on your metal channel. 

Thank you and let us know if you have any other questions or concerns.

Comparison of the S378, S380 and S385 balance shoes.