Features: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information;2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed.3.Made of steel and nylon. With M8x18mm thread stem.4.Widely used in transmission systems, feeding systems, processing systems, packaging auxiliary equipment, etc.5.Each Load Bearing is 45KG.Specifications:Material: Nylon(Ball) + SteelColor: SilverBrand name: BQLZRThread: M8x18mmBall Diameter: 15mmSize: 3.9x2.4cm/1.54x0.94inch(HxDia)Load Bearing: 45KGWeight: 47gPackage include:1 x Ball Transfer Bearing