Extreme Max 3005.3729 24" Heavy-Duty Plastic Roll-In Dock / Boat Lift Wheel Heavy-duty plastic wheel for roll-in docks and lifts Designed to roll easily on rough, soft, or uneven terrain Maintenance-free plastic will not rust on shaft 24" diameter with 8" treads / 4" diameter x 7-3/4" long hub / 1.98" diameter shaft / 800 lb. capacity per wheel One-year warranty