5" X 2" Swivel Casters Heavy Duty Polyurethane Wheel on Steel Hub 1000lb Each (4) Tool Box 5" X 2" Swivel Casters Heavy Duty Polyurethane Wheel on Steel Hub 1000lb Each (4) Tool Box Material: Heavy Duty Polyurethane on Steel Hub 3/4" Roller Bearing with 1/2" ID Bushing (Manufacture will provide zerk fitting in the wheel or axle) 1 Set- (4) Swivel Casters