Coil springs

A home owner from Charleston, SC says:
August 30, 2019
Looking to replace springs and the slide they mount on.
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Bob from SWISCO responded:
September 4, 2019

Thanks for posting. This pivot shoe looks like our 15-180. This pivot shoe is compatible with our Series 190 Coil Springs. You may either have a coil stamped 6 or 9, which would indicate either our S190-940 or S190-640. To know which you need, you may need to weigh your window sash. You can then divide that exact weight in half to tell you how much spring weight support you require on either side of the sash. 
Coil Balance Shoe
Coil Balance Shoe
15-180
$3.97
940 S190 Coil Balance Spring
940 S190 Coil Balance Spring
S190-940
$11.94
640 S190 Coil Balance Spring
640 S190 Coil Balance Spring
S190-640
$9.74
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