simonton duoble hung window counterbalance spring

A home owner from Flat Rock, MI says:
November 7, 2022

no numbers. spring is 3/4" wide. approximately 36" long. bottom window weighs 13.5 lbs

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Casey from SWISCO responded:
November 11, 2022

Hello,

Your coil springs resemble the 3/4" wide S170 and S171 but we would like to see the pivot shoe that they anchor to in order to confirm if they would be compatible with your hardware. Thank you!
A home owner from Flat Rock, MI says:
November 11, 2022
Here is a similar pivot shoe. Thank you
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Casey from SWISCO responded:
November 14, 2022

Great, your pivot shoe resembles our 15-192, which uses our Series 170 and Series 171 coil springs. For a 13-1/2" pound sash, I would recommend using one S170-407 on each side of the window. Thanks for posting! 
A home owner from Flat Rock, MI says:
November 14, 2022
thank you so much.
407 Series 170 Coiled Balance Spring
407 Series 170 Coiled Balance Spring
S170-407
$6.55
CertainTeed Pivot Shoe
CertainTeed Pivot Shoe
15-192
$6.39
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