Replacement Parts

Thanks for posting. See our S351-31 or S390-31 Channel Balance. The only difference between these two balances is the depth of the bottom nylon shoe, or the heel-to-toe measurement. See the diagram below. Measure your old balance's shoe depth to see what matches best.

Comparison of the S351 and S390 balance shoes.

You also have to choose a stamp option, which reflects the strength of the balance. Your old stamp of 3090 is from an outdated rating system. To know what stamp to select, go by the weight of the window sash. That stamp of '35' should indicate your sash weighs 35 pounds. In that case then you can choose a stamp option of 3060, which denotes a balance that can support a window sash in the weight range of 32 through 35 pounds.