CONSTANT FORCE SPRINGS FOR TILT APPLICATIONS

A contractor from Boston says:
May 7, 2021
Hello here is a photo of one of the two constant force springs that i need (left and right) the bottom window weight is 17.5 LBS the numbers on the springs are 5.15x and 4.16x i hope this can help in identifying the correct parts Thank You Marc,
Thumbnail of the uploaded file named IMG_1518 (1).jpg
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Casey from SWISCO responded:
May 11, 2021

Hello,

This looks like our 15-087 shoe, which uses Series 180 coil balances. For your sash weight, you would use one S180-4 and one S180-5 on each side of the window. Thanks for posting! 
Coil Housing Pivot
Coil Housing Pivot
15-087
$5.97
4 lbs Series 180 Coil Balance
4 lbs Series 180 Coil Balance
S180-04
$4.20
5 lbs Series 180 Coil Balance
5 lbs Series 180 Coil Balance
S180-05
$4.37
Tandem Coil Housing
Tandem Coil Housing
15-086
$1.68
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