PrimeLine Products D 1502 Roller 114 in Outside Diameter Steel wBall Bearings Concave Edge WheelBrass

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 1-1/4 inch outside diameter, Features concave (grooved) edge for use over raised tracks, Constructed of a steel wheel, steel race, and steel ball bearings, Maximum load rating of 70 lbs. per wheel