Window channel balance

Question

Replacing the balances in single hung vinyl windows. original part is 33 inches long (not including plastic end pieces), 9/16 inch wide, and 5/8 inch deep.

Stamped markings on part are 3230 BSI.

Bob · Accepted Answer

Thanks for posting. See either our S380-33 or S385-33. The difference between these two channel balances is the depth of the bottom nylon shoe, or the 'heel-to-toe' measurement. See the diagram below for reference. Compare both with your old hardware to see what matches best. For a new stamp option, choose 3230.

Comparison of the S378, S380 and S385 balance shoes.