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

This is a tension spring roller assembly with a V spring design used by Academy and a variety of other sliding patio door manufacturers. The roller is a 1 in. high-density polyethylene roller with a 1-3/4 in. long tension spring that is a heat treated steel spring. When installed the bent or angled flat spring positions the roller assembly so that an adjusting screw adjusts the height of the roller as needed.