⚙️HEAVY-DUTY CASTERS: The heavy duty steel casters are made of high-quality mixed of Steel(Felixible)with strong Cast Iron hub, bright galvanized steel wheels and zinc plated finished yoke. The Heavy Duty Steel wheels have strong abrasion resistance are not easy to rust, can be used from -50F to 800F temperature,and have strong shock absorption and buffering performance, which increases the service life. ⚙️Strong Bearing and High Capacity: Industrial caster wheel 5 inch diameter, 2 inch width, top plate: 4"x 4-1/2", caster overall height: 6-1/2", with ¾” roller bearing,and ½" ID spanner bushing with Zerk Axle and Nylon Nut One caster can be loaded up to 1000 lbs, strong load-bearing capacity, so you can buy and use with confidence. ⚙️Swivel Smoothly and Quietly: The Steel casters contains Stong Roller bearing, and steel Spanner Bushing,rotated 360 degree smoothly,and quietly; Zerk Axle and Nylon nut make the caster tight, not easy to lose and also can be used on any floor condintion and serive for a long life.The Heavy Duty Steel Caster wheels adopts humanized size Brake and Swivel design, which is quieter flexible,and is an indispensable item in the family. ⚙️WIDE RANGE OF USES: The Heavy Duty Wheel can be easily installed and replaced, and are designed for handling. Steel indoor and outdoor caster have a wide range of uses, such as pallet jacks,handling trucks, moblie storage carts, material Transition cart,trolleys, platform trucks,Freight Trucks, furniture,cargo, containers,trash bins, workbenches and many other uses. ⚙️QUALITY ASSURANCE: 90days free return and refund. Provide Axle & nuts, yoke and wheel replacement severice any time. Product specifications: Wheel material: Cast Iron Wheel diameter: 5 inches Wheel width: 2 inches Caster Top Plate: 4x 4-1/2 Overall Height: 6-1/2 Load capacity: 1000LB Wheel color: Sliver Number of Casters: 4 Caster Form: 2Swivel&2Brakes