Thanks for posting! It sounds like you'd need our S745-32
Peachtree channel balance, but I'm not quite sure about the stamp option. Please take a look at the available options for the S745-32
and their corresponding strengths and compare them to the weight of your sash.
31.25-3 can carry a window sash weight range of 17 through 23 pounds.
31.25-4 can carry 24 through 28 pounds.
31.25-5 can carry 29 through 32 pounds.
31.25-6 can carry 33 through 35 pounds.
31.25-9 can carry 36 through 38 pounds.
Does your sash's weight fall within any of those weight ranges? Please also keep in mind that the weight range information is based on 2 balances per sash. Balances are designed assuming friction in the jamb weather-strip will carry a portion of the sash weight. Suggested sash weights are approximate.