【HEAVY-DUTY CASTER】HANDSAMMU heavy duty casters are made of High-quality polyurethane tread high impact polypropylene core, The Heavy Duty Caster Wheel have strong abrasion resistance, are not easy to rust, and have strong shock absorption and buffering performance, which increases the service life. 【CASTER SIZE】 Industrial caster diameter: 4 inches, width: 2 inches, top plate: 4x 4-1/2, with DOUBLE PRECISION BALL BEARING. Four casters can support load 2400lb, strong load-bearing capacity, so you can buy and use with confidence. 【HIGH RESISTANCE】Industrial caster wheels offer more floor protection, non-marking treads, quieter rolling, & smoother rides compared to steel. The Polyurethane on Polypropylene wheel is a very attractive all-purpose wheel which is versatile and stylish. 【WIDELY USE】These are fantastic wheels for many applications like panel trucks, Drywall Cart, U-Boat Platform Trucks, Lift Tables, Dollies Cart,ect. Also High-quality Caster wheel can drastically help you improve your Heavy Duty Caster rolling performance in the right environments. 【QUALITY ASSURANCE】: First of all, thank you for choosing HANDSAMMU'S heavy duty casters wheel. If you have any questions or quality problems about Casters wheel, please contact us in time, we will solve the problem for you as soon as possible. Product specifications: Wheel material: Polyurethane on Polypropylene Wheel diameter: 4 inches Wheel width: 2 inches Load capacity: 600LB Wheel color: Blue Durometer: 95 Shore A (+/-5) Temp Range: -30F to 180F Number of Casters Wheel: 1