Andersen sash balance 5#31

A contractor from maryland says:
i need 4 replacement Anderson window balances and would appeciate your help in chosing the correct replacement part. my existing part has stamped on it the #s 11600-2 and j45 5#31 2-79

thank you in advance
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Paul from SWISCO responded:
Hi Chris,
Thanks for posting! Please take a look at our 24-531 Andersen sash balance, which can replace balance boxes with the stamp 531.

Be sure to also take a look at our video tutorial on how to install your Andersen channel balance.

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