Searching for apex extended block and tackle balance

A quick learner says:
I think this is Apex Extended block and tackle balance. Do you carry a replacement?
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Casey from SWISCO responded:


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.

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