This stainless steel roller assembly with M shaped tension spring with a 1 in H density polyethylene roller is used by several patio door manufacturers. The heat-treated stainless steel tension spring is 2-5/16 in L and shaped like a M giving it the tension needed by the screen door to slide properly.
Height adjustments is made from edge of door by turning screw in corner
Height adjustments is made from edge of door by turning screw in corner
Stainless steel ball bearing roller resists rust and corrosion and will roll smoothly
Heat-treated stainless steel M style tension spring