SWISCO - The Replacement Hardware Authority

D33-7427-533 Anderson sash balance

A quick learner from Buffalo, NY says:
I have a Anderson sash balance. I can't find any that match the number on balance is D33-7427-533 and 600-17 can u find this for me?
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Tom from SWISCO responded:
I believe the key stamp here is "7427." I have a couple questions, though. Is the "4" a little different from the other numbers, perhaps a little smaller? If so, I think we can ignore it. Our 24-737 can replace all Andersen balance boxes marked with "7 27," which I think are the key numbers on your unit.
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