16 PCS Roller Ball Transfer Bearing, 1/2 Inch Flange Mounted Carbon Steel Round Ball Transfer Unit, Universal Rotation Ball Casters for Conveyor, Roller Stand, Transmission, Load Capacity 22 lbs

["CAPACITY: Each ball transfer roller with a load capacity of 22 lbs","SIZE: 16 Pcs 1/2 inch diameter ball bearing roller, 360-degree rotation","Material: The bearing units were made of high quality carbon steel, strong and durable, good wear resistance and not easy to wear out","MOUNTING: Two screw holes, Mounting Hole Dia: 4mm/0.16 inch","APPLICATION: Widely used in conveyor lines installing, home appliance, transmission system, processing system, wooden case, transmission furniture, workbench, etc"]