Coil Spring

Many thanks for writing in. It's difficult to say for certain what you need without seeing the coil balance system removed from the window, but what you show looks like our 15-086 Coil Spring Housings. They connect to the 15-087 Housing Pivot, and use our Series 180 Coil Springs. You will need to remove the nylon housings and see if the coil springs match the Series 180 design. You will also need the spring weight stamped on the coil springs