Any idea if you have this part?

Thanks for writing in. This looks like our 15-087 Pivot Shoe; but the cam is a bit different. Could you show us your current pivot bar? I want to make sure it's compatible with the new shoe. Also see our 15-086 Tandem housing and 16-024 Bracket, if needed. These coil balance system uses our Series 180 Coil Springs. The 6 lb stamp may indeed indicate you need (2) of the S180-6, for 6 lbs of support apiece, but I'm never as confident of stamps on the housing rather than the springs themselves. If you want to be safe, weigh your window sash. Give us that exact weight, and we'll tell you what you need. Many thanks.