15 pounds coil balances

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!