Swivel Caster, 300 lb Weight, Wheel Diameter: 4 in, Wheel Material: TPU, Bearing Type: Ball, Plate Dimensions: 2-5/8 x 3-3/4 in, Housing Material: Polypropylene, Powder-Coated, Black/Blue, Plate Mounting, Dimensions: 5 in L x 2-5/8 in W x 5 in H