Need new balances brace riveted on 9/16 wide 24 7/8 long

A quick learner from Youngstown ohio says:

Steve 

I have 23 windows to repair the largest is 17.1 lbs

No markings on old balance about 1940 construction

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Emily from SWISCO responded:

Hi, Steve. 

Take a look at our S500-25 5/8" diameter spiral balance along with the 17-012 bracket which is sold separately. Look these parts over and see what you think. You'll just need to weigh your sash on a scale and refer to the chart under the product description on the S500-25 product page to determine the correct color tip option.

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How to Identify a Replacement Spiral Balance
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