Prime-Line 1 in. D X 0.25 in. L Steel Spring Tension Roller Assembly 2 pk

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,Installed by snapping onto existing door,1/4 in. wide roller,No tools required for installation,For further dimensional information, please see the line drawing