Features: 1.DURABLE MATERIAL: Wheel is made of excellent materials molded for maximum density and strength and are very strong and durable 2.WATERPROOF AND COLD PROOF: Wheels are made with special waterproof compounds and are reinforced using uniform fibers to provide excellent service even in wet and cold applications 3.CORROSION RESISTANT WHEEL: Wheel resists degradation, deterioration and corrosion of oil, grease, common acids and solvents 4.PRODUCT SIZE: Jack guide wheel with 16mm center hole, 200mm ring length, 52mm ring width, 1100lb capacity 5.APPLICABLE SCENARIO: Adopts iron bearing and rubber wheel, which is suitable for travel trailer jack guide wheel Specification: Item Type: Jack Guide Wheel_x000D_ Product Material: Iron bearing, rubber wheel_x000D_ Capacity: 1100lbs (about 500kg)_x000D_ Center Hole Diameter: Approx. 16mm / 0.63in_x000D_ Application: Suitable for towing trailer jack guide wheel PackageList: 1 x Jack Guide Wheel