6" X 2" Swivel Casters Heavy Duty Polyurethane Wheel on Steel Hub 1200lb Ea. (4) Tool Box 6" X 2" Swivel Casters Heavy Duty Polyurethane Wheel on Steel Hub 1200lb Ea. (4) Tool Box 3/4" Roller Bearing with 1/2" ID Bushing a(Manufacture will provide zerk fitting in the wheel or axle) Material: Heavy Duty Polyurethane on Steel Hub Capacity: 1200 lbs each 1 Set- (4) Swivels