window springs

Question

window spring for windows installed in 1988.  Length 30 inches with plastic slides on each end.  Inside spring with string pulley system inside aluminum channel...need one for left and one for right side of window.

Casey · Accepted Answer

Hello,

It looks like your balance has non-winged end fittings. If so, you have either our S351, with a 15-002 bottom attachment, or S390, with a 15-001 bottom attachment. Take a look at the image below to determine which balance you'll need.

You'll also need to locate the stamp on your balance to choose the corresponding spring strength option for your replacement balances. Thank you!

Comparison of the S351 and S390 balance shoes.