Introductions:The Pneumatic Tool Car Rubber Wheels is made of nylon reinforced 2.25-4 rubber air tires, which is durable and heavy duty. This wheel is abrasion resistant and high elasticity. And it also surcharge load, which can maximum bear 136.08kg/300lbs weight. With its fine workmanship and reasonable price, this wheel has received much praise, so what are you waiting for? Just take action, this wheel deserves your attention.Features:1. Made of nylon reinforced 2.25-4 rubber air tires, durable and heavy duty2. Abrasion resistant and high elasticity3. Surcharge load, can maximum bear 136.08kg/300lbs4. Fine workmanship and reasonable price5. Long lifespanSpecifications:1. Features: Durable Heavy Duty 2. Type: 2Pcs Rigid 2Pcs Swivel 8" Air Tire Caster 3. Tire Material: Nylon Reinforced 2.25-4 Rubber Air Tires 4. Multi-Purpose Air Tire Inflate: up to 36PSI 5. Wheel Material: Heavy Duty Zinc Plated Wheel 6. Bearing: Each Turns on Ball Bearings 7. Wheel Size: 8" x 2-1/4" 8. Maximum Weight Capacity: 136.08kg / 300lbs9. Top Base Measures: 4-1/2 x 4" 10. Overall Height: 10" 11. Bolt Spacing: 3-5/8" x 2-5/8" 12. Grease: Fitting on Base 13. Perfect for: All Applications 14. Weight: 10.5kg / 23.15lbs15. Color: BlackPackage Includes:4 x 8" Pneumatic Tool Car Rubber Wheels