Window spring. 3030. BSI. LE

A handy person from Kansas city mo says:
March 3, 2023
31 inch metal 1and 1/16 on the plastic part
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Jasmine from SWISCO responded:
March 6, 2023

Thanks for posting! Your shoe is likely measuring 1-1/16" because it was worn down over the years however it is likely 1-1/8". 

You can use our S390-31 channel balance with a 3030 stamp. I am confident this is the correct replacement balance.
31" Series 390 Channel Balance
31" Series 390 Channel Balance
S390-31
$11.30
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