Balance Identification

Double-check the length of the metal channel; I believe it will be 34" in length. If so, see our S380-34 or S385-34. The only difference between these two balances is the bottom nylon shoe depth, so compare both with your old hardware to see what you need. You'll then need to choose a stamp option. Your old code of 33-9 is from a  rating system we don't use. Obtain the exact weight of your window sash. You can then match that exact weight with one of the weight ranges listed alongside each stamp option on the balance shop page.