Channel balance shoe ID needed

Hello,

I don't recognize this roller at first glance but I know someone who might. I'll have them take a look at your photos and we'll reach out as soon as more information is available. Thank you!

I believe these balances slide in a wood window jamb liner. The balance channels and springs are standard but the nylon ends were made exclusive for the window manufacturer and are not available on the open market. My suggestion is to contact a millwork and purchase new jamb liners for your sashes.