Replacement Spiral Balances

A handy person from Hartford, CT says:
June 2, 2021
I want to replace the spiral balances in 4 double hung, non tilt windows. This is a photo of the current balance; the current tip looks gray, but I'm not sure.

The tube is 5/8" diameter and 25 " long; each sash weighs about 13 - 14 lbs.

What should I buy to replace them?
Thumbnail of the uploaded file named 3rd Floor Window Balance.jpg
Profile picture of Casey
Casey from SWISCO responded:
June 7, 2021

Hello,

Take a look and compare our S500-25 spiral balance with a red tip to support a window sash between 7 and 29 lbs. Thanks for posting! 
Bracket, #32
Bracket, #32
17-012
$1.20
25" Series 500 Spiral Balance
25" Series 500 Spiral Balance
S500-25
$9.12
How to Identify a Replacement Spiral Balance
How to Identify a Replacement Spiral Balance
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How to adjust a spiral balance on a non-tilt window
How to adjust a spiral balance on a non-tilt window
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