Cal-June 16" Dock Wheel Bumper with Straight BracketThis smooth rolling dock wheel provides a substantial cushion in the most troublesome tides, currents or fresh breezes. Featuring the finest heavy-duty vinyl wall construction with hot-dipped galvanized or epoxy coated steel hardware throughout. Equipped with molded valve for adjusting the air pressure and a 2" diameter axle for stability and durability. Measures 16" in diameter x 6" high. Straight mount.