Window parts

Looks like you need a coil balance. We can help, but I'll need you to remove the sash from the window frame and show me a clear picture of the pivot shoe. This is a square or rectangular piece of plastic to which the coil springs attach.

I can see the pivot shoe in your third photo, but it is too obscured for me to identify. You need to remove the sash from the frame before you take your picture so that we can see as much of it as possible.

Thanks! That looks like our 15-199, which means you likely have our 3/8" thick Series 165. You should check your thickness to ensure that's the same. This spring is compatible with the 15-205 double support.