Atrium Window Balance replacement

A quick learner from Phoenix AZ says:
I need help finding the correct or similar balances that will work for my window.

the stamp on the 35" balance is 34 9 KW CMC 7

User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
Hello! This balance looks like a match for our S395-35 channel balance. However, you will need to weigh your sash to determine the proper stamp option. We have a chart on the S395-35 store page that tells you exactly how much weight each option can support.
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