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.The pulley bearing is made of steel, the bearing model is 696ZZ, the outer part is made of white plyoxymethylene material, with U type groove, beautiful appearance, reliable and durable.4.Size: Pulley: 6x24x9mm/0.24x0.94x0.35inch (IDxODxT)Slot: 3x6.4mm/0.12x0.25inch (TxW)Arc: 3.2mm/0.13inch5.It can bear 77KG.6.Suitable for sliding doors, sliding windows, 3d printers, etc.Specifications:Material: Plyoxymethylene & Bearing steelColor: WhiteBrand name: leopardSize:Pulley: 6x24x9mm/0.24x0.94x0.35inch (IDxODxT)Slot: 3x6.4mm/0.12x0.25inch (TxW)Arc: 3.2mm/0.13inchWeight: 46gPackage include:8 x Bearing Pulley Wheel