Our double hung windows have two balances on each side of the sash (so 4 spring balances total per sash). The pivot shoes on some of the sashes are broken. I've attached the best picture I can get without removing the sash (which I didn't want to do until I have the replacement parts in case I am unable to put it back in with the broken shoe. I also am attaching a picture of the double spring balances in case that is helpful.
Do you have any idea what pivot shoes these are?
Thank you!