Window channel guide, 1/2 ", 22.2/8" in lengh

Hello,

It looks like you have either our S351-22, with a 15-002 bottom attachment, or S390-22, with a 15-001 bottom attachment. Take a look at the image below to determine which balance you'll need. You'll also need a 2810 spring strength option for your replacement balances. 

You'll also need to weigh your sash to determine which option you'll need. There is a chart on the product page that explains how to choose your option based on the sash weight. Thank you!

Comparison of the S351 and S390 balance shoes.