window balance replacement

A home owner from Denver, CO says:
June 14, 2020
Hi, I have a window balance stamped 32-4 BM5 CMC 9, it is 1/2" wide, it appears to match the "S351" end sets from your ID page. I have attached photos of the ends and the stamp. The Aluminium section is 33" long
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Bob from SWISCO responded:
June 17, 2020

Take a look at our S351-33 or S390-33, depending on the depth of the bottom nylon shoe. You'll need a stamp option of 3240. 
33" Series 351 Channel Balance
33" Series 351 Channel Balance
S351-33
$11.52
33" Series 390 Channel Balance
33" Series 390 Channel Balance
S390-33
$11.52
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