Window balance

Question

I believe these are called window balance or counter balance support springs(?). We need to replace this pair of springs for a window that slides from the bottom and holds at the top. I've looked on the PELLA site and was not able to find the item based on the model number or searching through all window replacement parts. Are you able to help with this?  Thank you.

Bob · Accepted Answer

Thanks for posting. This looks like an S380-32 or S385-32 Channel Balance. The only difference between these two balances is the depth of the bottom nylon shoe, or the 'heel-to-toe' measurement. See the diagram below for reference. Compare both balances with your old hardware to see what matches best. In either case, for a stamp option choose 3130.

Comparison of the S378, S380 and S385 balance shoes.