window channel balance Caldwell 20 5 GQ - 21" channel

Question

I need to replace two of these window balances on a non-tilting window. Channel length is 21". Window is Milgard, installed in 1998. Please help in identifying this part.

Thank you,

Margaret

Bob · Accepted Answer

Hi Margaret. It looks like you have either our S380-21 or S385-21. The only difference between these two balances is the depth of the bottom nylon shoe, or the 'heel-to-toe' measurement, so compare both with your old hardware to see what matches best. For a new stamp option choose 2050.

Comparison of the S378, S380 and S385 balance shoes.