15 pounds coil balances

A quick learner from USA says:
March 28, 2022
1/2 inch wide 15 pounds window.
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Casey from SWISCO responded:
March 29, 2022

Hello,

Take a look at the 15-32" wide S180 coil spring. For a 15 pound sash, you should be able to use one S180-5 and one A180-3 on each side of the window. It would technically support a 16-pound sash but you'll be good to go as long as you're within one pound of your sash weight. Thanks for posting! 
3 lbs Series 180 Coil Balance
3 lbs Series 180 Coil Balance
S180-03
$4.20
5 lbs Series 180 Coil Balance
5 lbs Series 180 Coil Balance
S180-05
$4.37
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