Features Roller Bearing: Equipped with roller bearing to ensures stable rotation as well as saving the labour when pulling the cart. Firm Structure: Designed to have a sturdy structure with excellent stability, the wheel allows for 440lbs bearing capacity. Fast in Moving: The swivel caster with 8in diameter enables more flexible rolling and easier turning under a high speed. Good Materials: Combining rubber wheel and alloy hub, the trolley caster has good durability against wearing and long use. Practical Uses: Can be installed on trolleys or carts for transportation in airports, hotels, warehouses, etc., very useful. Specification: Item Type: Swivel Caster Material: Alloy, rubber. Caster Outer Diameter: 8in Bearing: Approx. 200 kg / 440 lb Package List:1 x Swivel Caster Package List 1 x Swivel Caster