Window balance channel

A quick learner from Miami says:
June 13, 2019
27 in long. One window has 3040, the rest 3030
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Paul from SWISCO responded:
June 14, 2019

At first glance, it looks like you can use our Series 377 channel balance as a replacement. This comes assembled with a 19-018 top balance shoe and 15-005 bottom balance shoe. Take a look and see if you agree. I am a little confused about the length of your balance. You mention that it is 27", however, your stamping of "3030" and "3040" indicates to us that the metal length measurement of your balance should be 31". I strongly suggest reconfirming the length of the balance. 
31" Series 377 Channel Balance
31" Series 377 Channel Balance
S377-31
$11.52
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