Coil Balance replacement

A home owner from NC says:
Trying to find the replacement for this dual coil balance. It has a 6 or 9 stampted on it but the dual balances I see start at 11. Any advice?
Thumbnail of the uploaded file named WindowBalance2.jpg
Thumbnail of the uploaded file named WindowBalance1.jpg
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Tom from SWISCO responded:

Thanks for posting! The coil springs look to be in good condition, it appears that only your shoe is broken. With that in mind, I recommend our 15-180. This should work well for you.

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