window balance

Question

Hi, I need new balances for pretty much all my windows. They're 20 year old windows, no markings on the balances other than what's stamped into the metal:
29 2 (perpendicular to that) BSI MF

Bob · Accepted Answer

See either our S380-30 or S385-30. 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 need a stamp option of 2920.