Description:

These steel rollers will outlast plastic and nylon rollers, but should not be used in coastal areas, or where exposed to prolonged high-humidity. 5/16 inch wheel thickness, 1/4 inch inside diameter of axle hole with 1-1/2 inch outside diameter. Features concave (grooved) edge for use over raised tracks. Maximum load rating of 105 lbs. per wheel. Constructed of a steel wheel, steel race, and steel ball bearings for greatest support. Steel ball bearing wheels for long-lasting usage. Used on a variety of sliding patio door systems.