【Heavy-Duty Casters】The heavy duty casters are made of high-quality polyurethane molds, bright galvanized steel wheels and yokes. The caster wheels 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: 6 inches, width: 2 inches. Plate size: Top plate 4"x4-1/2", mounting over heights 7-1/2", One caster wheel Load capacity is 1200lb, one set of 4 load Capacity will be 4800LB. 【Caster Feature】 The casters are wear resistance and durability, and their sturdy construction are designed for Industrial Equipment. The Caster Wheels are specially engineered to withstand harsh chemical environments and are resistant to greases, blood, oils, brine, solvents, and water including wash down applications. 【Widely Application】The 6 inch caster wheels can be used indoor and outdoor. Steel casters have a wide range of uses, such as pallet trucks, inventory carts, trolleys, platform carts, furniture,workbenches and many other uses. 【Adaptable to Various Uses】Polyurethane wheels are adaptable to different environments and conditions, resistant to most chemicals, oils, acids, greases and water, providing reliable performance even in extreme industrial environments. Product specifications: Wheel material: Polyurethane, Steel Wheel diameter: 6 inches Wheel width: 2 inches Top plate 4"x4-1/2" Caster Overall Height: 7-1/2" Bearing type: Roller Bearing Load capacity: 4800LB (4 pack) Wheel color: Green Number of Casters: 4