Window Balance 29 3 FQ Caldwell

I'm afraid I can't tell what you have based on this picture. The key components for identifying the balance is the nylon ends, but yours are hard to make out. I recommend that you look at our 1/2" Channel Balance Home Page and see if anything here could work.

Depending on the size of your balance shoe will determine whether you may need our Series 380 or Series 385 channel balance. Carefully compare your measurements to ours to see which of these balances could be a match for you. Get back to us and let us know how you made out with this.