Need help ordering the right parts

A quick learner from USA says:
Need 4 window balances plz
Stamp on balance says
32 3 kW cmc 7
User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
Good morning! This balance very closely resembles our S390-33 channel balance. I would just carefully go over the information on the S390-33 store page to confirm that this is a good match. One detail in particular that you should pay attention to is the size of the bottom shoe. The S390-33 comes with the 15-001, which is 1-1/8" deep. You should definitely make sure your shoe is the same size.

I would also recommend the 3230 option based on your stamp, but you can always weigh your sash to confirm.`
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