Coil balance certain teed vinyl replacement windows

A quick learner from Syracuse ny says:
April 9, 2019
Hi I need to replace the coil balance in window the existing coil balance stamped #407 under this #it loos like the letter j would I use you part # S170-407.
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Bob from SWISCO responded:
April 10, 2019

Thanks for writing in. If you have a Certainteed window, then most likely you have a 15-192 Pivot Shoe; this indeed is compatible with our Series 170 Coil Springs. If so, then yes, you're absolutely right, a #407 stamp on the coil spring indicates you'd want to replace that coil with our S170-407, which is meant to individually support 7 lbs. 
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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