Feature: 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 lead Screw is used for general machine tools, 3D printing4.The bearing has a wide inner ring with two set screws for attaching to the shaft.5.The Coupler is zero backlash,and Designed to help compensate for misaligned parallels and axial6.A set of Lead Screw,widely used to connect servo motor, stepper motor, encoder, screw driving, machine platform, etc7.This Set includes 1 pcs Lead Screw Nut,2 pcs Pillow Block Flange Bearing and 2 pcs Flexible Shaft CouplingSpecification:Color: SilverBrand name: Total Weight:211gPackage Include:1 x Stainless Steel \u0026 Brass L350mm D8mm 2mm Lead Screw Nut 2 x Zinc Alloy 8mm Inner Dia Pillow Block Flange Bearing2 x Aluminium Alloy D19L25 5 x 8mm Flexible Shaft Coupling