SWISCO - The Replacement Hardware Authority

Caldwell window balance replacement

A home owner says:
Part identifed as "20 4 Caldwell KM". Metal portion measures 21" from end to end. Add 1" for total length from plastic end caps.
User submitted photos of a window balance.
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Paul from SWISCO responded:
This looks like our S385-21 channel balance. Look it over and tell me if you agree.
A quick learner says:
Yes. That appears to be it. I'm unable to locate the stamp on the channel balance, but the sash is approximately 20 pounds, so it appears that I should get the 2040 option.
Profile picture of Paul
Paul from SWISCO responded:
Great! Yes, 2040 sounds perfect for a 20 pound sash.
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