anderson window balances

A contractor from N Cape May says:
as u can c from pics, I have a K3 8#23 7-87 anderson window balance. I believe that is ur 823...correct?

Anyway I also need the left side...so I'll need that part # also.
Thanks
User submitted photo of their window balance.
Profile picture of Paul
Paul from SWISCO responded:
Yes, I believe our 24-837 is what you want. This can replace balance boxes stamped with "8#23."
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