replacement part for coil balance

A home owner from Orlando says:
February 16, 2023
Hi Team,

I want to replace constant force window balance coil as its broken for one of the window which of type double hung slide up and down.
Please suggest me which coil i need to select as there are many options here and I am confused which one fits.
https://www.swisco.com/cl/Replacement-Sash-Support-Coil-Balances

Thanks,
Sindhu
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Casey from SWISCO responded:
February 17, 2023

Hello,

Your pivot shoe looks like a match to the 15-180 balance shoe, which is used with the Series 190 coil springs. Review the specifications of these parts and the related items shown on our product pages. Thanks for posting!  
A home owner from Orlando says:
February 17, 2023
Hi Casey,

You suggested Series 190 coil balance . But in this its asking to choose a balance stamp from below https://www.swisco.com/cl/Series-190-Coil-Balance . How do we know which balance stamp works for my window coil balance ?
440
540
640
740
840
940

Thanks,
Sindhu
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Casey from SWISCO responded:
February 20, 2023

Your original coil springs should have numbers stamped on the base that would correlate to one of our strength options. The first number is what would match your original coil stamp since the 40 in our strength options indicates that the coil has 40" of travel length. 
Coil Balance Shoe
Coil Balance Shoe
15-180
$3.97
Coil Balance Clip
Coil Balance Clip
15-186
$5.05
Balance Bushing
Balance Bushing
15-182
$1.80
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How to remove window pivot shoes
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