MI Window

Thanks for writing in! Your coil balance assembly reminds me of our Series 161 Constant Force Balance System. Since the housing of your coil assemblies are stamped with both a 6 and a 7 it is likely that you have 26lb window.

With that said, you'll need the S161-6 along with the 15-086 tandem coil housing and the S180-7 coil balance spring. You'll install the Series 180 coil in the tandem housing and then attach it to the Series 161 Roller-Tilt.

Alternate image for S161-06