Window balance replacements

Question

I have
first floor 11 - 34x64 windows
second floor 7 - 34x58 windows
most don't stay up. I took out one balance from a 34x64 window ( photos attached) the plastic tube measured 32 inches and it has a red tip.
I want to make sure I get the correct replacement, please help. I'm going to start with one pair before ordering for the rest of the windows.

Casey · Accepted Answer

Hello,

Your photos resemble the (3/8") S900 or (5/8") S600 red tip spiral balances, depending on the diameter of the plastic housing tube. You'll also need red tip options for your replacement balances. Thanks for posting!