4 Pack Sliding Screen Door Tension Spring Fits for Columbia Doors, Replaces B 691 and B 695 Used on Both Top and Bottom, 1" Concaved Steel Ball Bearing

Compatible with Columbia doors as well as a variety of other sliding screen door manufacturers for replacing similar spring tension rollers. | 1 in. spring-loaded roller attached with an adjustable nylon housing. | The roller adjusts to the correct position needed with included screw on top. | It has a thinner high density polyethylene frame than the similar B 646 and B 737. | 4 pack included used on the top and the bottom of the sliding screen door, we recommend replacing all 4 rollers on single door panel at the same time.