This is a tension spring roller assembly with an offset tension spring design used by Academy and a variety of other patio door manufacturers. The roller is a 1 in. steel ball bearing roller attached to an offset heat treated tension spring. The 2-1/4 in. offset flat spring installs into the screen door frame and provides the tension required for the screen door to slide smoothly. For high density polyethylene ball bearing roller use Prime-Line part B 686.

• Used by Academy, Metal Industries, Arcadia and a variety of other sliding screen door manufacturers
• 2-1/4 in. tension spring that is bent on the back half
• 1 in. diameter concave roller
• Heat treated V style tension spring and steel roller