The smooth-rolling Taylor Made Dock Pro Inflatable Dock Wheel offers substantial cushioning for your boat. This dock wheel features a molded-in valve to adjust the level of firmness and heavy-duty hot-dipped galvanized hardware that mounts securely to your dock. This 18" wheel uses a large 2" diameter axle housing for maximum strength. Mounting hardware not included. 3-year warranty.• Molded-in valve to adjust level of firmness• Hot-dipped galvanized hardware• Large 2" diameter axle housing for maximum strength• Wheel Size: 18" dia.• Boat Size: 30' to 40' Heavy-duty hot-dipped galvanized hardware for secure mounting Uses a large 2"" diameter axle housing for maximum strength For 30' to 40' boats | Taylor Made Dock Pro 18" Inflatable Dock Wheel, Straight Mount