Features Sturdy Bearing: Equipped with strong bearing and rivet to ensures stable rotation and avoid unevenness during rolling. Firm Structure: Adopting premium nylon material, the widen and thicken structure is very reliable under heavy load. Quicker Moving: 4in fixed caster wheel enables smooth rolling with great stability, making the moving much quicker. Practical Uses: Can be installed on trolleys, machines or carts for transportation in airports, hotels, warehouses, etc. Easy to Install: Light in weight and compact in size, the convenient installation can be quickly completed in minutes. Specification: Item Type: Nylon Caster Material: Nylon Maximum Operating Temperature: 280℃ Castor Outer Diameter: 4in Castor Thickness: Approx. 32mm / 1.26in Connection Plate Size: Approx. 67 x 92mm / 2.64 x 3.62in Package List:1 x Nylon Caster Package List 1 x Nylon Caster