See window sticker

I'm confident we can replace this balance  system, but I cannot be sure what you have from these photos. Can you remove the pivot shoe from the window and show me a clear picture of it? That will tell us for sure what you need.

Thank you! This shoe looks like our 15-111, which is compatible with our Series 160 spring and 15-150D dual-spring cover. I think this hardware can work for you. All pricing can be found on each part's specific page. You'll need the number printed on your old coil spring to determine the best Series 160 option.