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Question

1620 on back. 17" long. want to confirm the top and bottom guides.

Casey · Accepted Answer

Hello,

It looks like you have either our S351-17, with a 15-002 bottom attachment, or S390-17, with a 15-001 bottom attachment. Take a look at the image below to determine which balance you'll need. You'll also need a 1620 spring strength option for your replacement balances. Thank you!

Comparison of the S351 and S390 balance shoes.