This heavy-duty 4in. Swivel Steel Caster is strong and sturdy enough to withstand the toughest environments. Some welding required. Some welding required. Wheel Diameter (in.): 4, Caster Type: Swivel, Wheel Type: Steel, Capacity (lbs.): 1,000, Wheel Width (in.): 2, Bearing Type: Ball, Foot Brake: No, Mount Height (in.): 5 3/4, Overall Height (in.): 5 3/4, Top Plate Dimensions L x W (in.): 4 1/2 x 3 7/8, Bolt Hole Spacing: 2 5/8 x 2 1/4, Casters (qty.): 1