REPLACEMENT WINDOW PARTS
NFRC 100
CODE:R/W
SPEC:NFRC
SERIES:852 PW
MST: 4040
Looks like you have an old rod type balance. These are unfortunately no longer made. We have modern balances that can work as a replacement, but your photos don't narrow down which type you have. There are three varieties.
In order to determine which of the three you have, I need you to either take the sash out of the window and show me a clear picture of the pivot shoe, or remove an undamaged version of the balance entirely and show me the pivot shoe that way.
The balance you show us will have to be an undamaged version. It's very difficult, if not impossible, to figure out what these are from a broken part.
Thank you! That's the old crossbow balance. The modern replacement for this is our Series 795, though the process of using our part is a little involved. I highly recommend watching the video below, which will explain everything.