The kit includes optical axes and lead screws, housings, linear guide brackets, CNC stepper couplers and ball bearings, fully equipped to meet your needs. Made of fine quality materials, strong wear resistance, low friction, high rigidity and long service life. Mainly used for industrial automation equipment, stepper motor rails. Such as 3D printers, engraving machine, XYZ module, slide, elevators, etc., widely used. You can have a try. Features: Kit includes optical axes and lead screws, housings, linear guide brackets, step couplers CNC stepper and ball bearings, fully equipped to meet the needs. Made of fine quality materials, strong wear resistance, low friction, high rigidity and long life life. The optical axis is suitable for a variety of electronic equipment, drive shafts, pillars. The bearing housing has a certain load capacity and has strong applicability. It can be mounted on ordinary precision brackets. Small in size, transmission power large, with stable performance.</p > Mainly used for industrial automation equipment, stepper motor rails. Such as 3D printers, engraving machine, XYZ module, slide, elevators, etc., widely used. Features: Name: Sliding Rail Set Glide Path: Linear guide Material: 45 Steel Accuracy Class: H Drag fixed: Locking type, Locking type Optical axis chrome plating: Φ8*400mm KP08 zinc alloy cushion Block bearing: 55*13*29mm SK8 Aluminum Rail Shaft Support: 42*32*14mm T8*8(P2) Stainless Steel Screw Lead Rod with Nut: 400*8mm SC8UU Bushing Slide: 8*34mm D19L25 Flexible Coupling: 5*8mm Item Size: 410 * 75 * 30mm / 16.14 * 2.95 * 1.18in Item Weight: 867g / 1.91lb Package size: 500 * 100 * 50mm / 19.69 * 3.94 * 1.97in Package weight: 900g / 1.98lb Package List: 2 * Optical Axis Chrome Plating 2 * KP08 Zinc Alloy Cushion Bearing Block 4*SK8 Aluminum Rail Shaft Bracket 1*T8*8(P2) Stainless Steel Screw Lead Rod with Nut 4 * SC8UU Bushing Slide 2 * D19L25 Flexible Coupling Shaft Notice: 1.Please allow bit error due to manual measurement. please make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Note: The data is all manual measurement, please allow 1 - 3cm error, due to the difference in light and display, there will be a certain color difference, depending on the physical object received Delivery quantity: (according to the main image)