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Casey from SWISCO responded:
July 14, 2021
Hello, I can't be sure but I suspect that your top attachments may have wings, which would indicate that you need the S395-34 balance with a 3330 option. If you're unsure, feel free to send us a photo of the top fitting to confirm. Thank you! |
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Casey from SWISCO responded:
July 15, 2021
Hello, I stand corrected, it looks like you have either our S351-34, with a 15-002 bottom attachment, or S390-34, 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 3330 spring strength option for your replacement balances. Thank you! 
Comparison of the S351 and S390 balance shoes.
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