Rigid Caster, 225 lb Weight, Wheel Diameter: 3 in, Wheel Material: TPU, Plate Dimensions: 2-5/8 x 3-3/4 in, Housing Material: Polypropylene, Powder-Coated, Black/Blue, Plate Mounting, Dimensions: 4 in L x 2-3/4 in W x 4 in H