Window balance

Thanks for writing in. Please confirm that the metal channel, not including the nylon fittings, is 29" long. If so, please see our S351-29 or S390-29. The only difference between these two balances is the 'depth' of the bottom nylon shoe, so compare both with your old hardware to see what matches best. You will then need to select a stamp option. Look for a stamp code on the metal channel. If there is none, or you are uncertain, weigh your window sash. You can then match that exact weight with one of the weight ranges listed alongside each stamp option on the product page.