I need to replace an Anderson window sash balance, stamped 11600-17

Thanks for reaching out to us. I'm afraid I can't quite make out what balance this might be. There should be another stamp printed on the flat tab that staples to the window header, but I can't make it out. Can you tell me if there's anything printed there?

If not, I'll need a clear and close up photo of every marking you see on the balance. The 11600-17 stamp you gave me is unfortunately not an identification number, so we need to look elsewhere on the part to find what we need.