Window balance

Question

I need the window balance the numbers on my old one say 26 4 BSI PD

Bob · Accepted Answer

Hello there. This looks like the S380-27 or S385-27. The only difference between these two channel balances is the 'depth' of the bottom nylon shoe. See below. Measure your old balance's shoe depth to see what matches best. For a stamp option choose 2640.

Comparison of the S378, S380 and S385 balance shoes.