Prime-Line 1 in. D X 1/4 in. L Steel Spring Tension Roller Assembly 2 pk

This is a center grooved sliding screen door tension roller that is used by a variety of sliding patio door manufacturers. Used on the bottom as well as the top of the sliding screen door. The roller is a 1 in. high density polyethylene ball bearing roller. The tension spring is 2-1/2 in. long and is a heat treated high tension steel spring. For the stainless steel use Prime-Line part B 573.