SWISCO - The Replacement Hardware Authority

Andersen sash balance help

A home owner from Pittsburgh says:
I think these are old and need replaced. It's hard to see the numbers but they are
J72 5#23 11-81

I'm thinking from reading previous posts that I need 523. Please let me know. Thanks!
User submitted a photo of an Andersen window balance.
Profile picture of Paul
Paul from SWISCO responded:
Please see our 24-531. This can replace Andersen balance boxes with the stamp 5#23.
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