Replacement CMC-6 Balancer
Thanks for your post! We do not have an exact replacement match for this window balance but I'm confident our Series 770 Channel Balance should work for the repair. To narrow down the correct option, I'll need to know the exact weight of the window sash.
The shoe appears to be a match for either the 15-210 or the 15-231. To determine which of these is the correct fit, you'll need to compare each of their dimensions. They can found on the website.
Please let me know if you have any additional questions.
and I believe the window has a 9/16" pocket, so the 15-231 would be the correct fit.
Should I get a pair so Ican replace both sides to ensure proper functioning?
Thanks for confirming. You'll need the S770-26 with a 26D stamp option. This will support a sash weighing between 22 to 26lbs.
It would be advised to replace both balances to ensure the sash is supported correctly. Especially since they are difference series.