Slide-Co 111766 Spring Tension Roller, 1 in Dia Roller, 1/4 in W Roller, Concave Roller, 1 -Roller, 2-5/16 in L, HDPE

This roller assembly with M shaped tension spring with a 1 in high-density polyethylene ball bearing roller is used by several patio door manufacturers. The heat-treated tension spring is 2-5/16 in long and shaped like an M giving it the tension needed by the screen door to slide properly.