Window balance size 33c

This stamp indicates the calibration of the spring the balance, or put simply, the weight range that the balance is designed to support. The stamp code of 33C translates to a stamp option of 3330 for some of our non-tilt channel balances; but in any event, we can't identify what balance you have from this stamp alone. Only seeing the nylon fittings or attachments on either end of the balance will allow us to do this. Show us these attachments, and we will endeavor to help you.

See our S351-34 or S390-34. Confirm your old balance's metal channel is indeed 34" long and that the nylon fittings match. The only difference between these two balances is the depth of the bottom nylon shoe, so compare both with your old hardware to see which matches best. You will need a stamp option of 3330.