Anderson balance

A home owner from 44622 says:
The number stamped on the balance is BF8 10#31 2-87 and also has the number 11600-17. Looking for replacement part number. Thanks.
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Lauren from SWISCO responded:

Hello, thank you for posting,

Please review the 24-1033 Andersen sash balance that can be used to replace balance boxes marked with 10#31. Let us know if you have any additional questions! 

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