Prime-Line Flat Screen Door Tension Spring with Roller

This center grooved sliding screen door tension roller is used by many patio door manufacturers. Used on the bottom as well as the top of the sliding screen door. The roller is a grooved high density polyethlene roller. The tension spring is 2-1/2 inches long & is a heat treated high tension steel spring.

No. B 521: Roller Diameter: 1 In., Material: Nylon, Roller Width: 1/4 In., Spring Type: Straight, Pkg Qty: 2, Package Type: Card