Suitable for roll-in docks or boat lifts, this heavy-duty wheel is rotomolded from UV-stabilized polyethylene. This tough rigid wheel is stress, crack, and impact-resistant and provides excellent performance in low temperatures. Rolls easily over virtually any terrain and will not rust on the axle. Easily mounted on a 1-7/8" O.D. axle. 700-lb. capacity. Sold individually. 18" diameter x 6"W. Rolls over virtually any terrain Mounts on 1-7/8"" O.D. axle 700-lb. capacity | Dock Edge Roll-In Dock Wheel, 18" Diameter x 6"W, each