Feature: 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 Product Material: Iron bearing, rubber wheel Capacity: 1100lbs (about 500kg) Center Hole Diameter: Approx. 16mm 0.63in Application: Suitable for towing trailer jack guide wheel. Package List: 1 x Jack Guide Wheel