The kit includes optical axes and lead screws, housings, linear guide supports, CNet stepper couplers, ball bearings, fully equipped to meet your needs. Made with quality materials, high wear resistance, low friction, high rigidity and long service life. Mainly used for industrial automation equipment, stepper motor rails. Such as 3D printers, engraving machines, XYZ module, slides, elevators, etc. are widely used. You can try. Features: The kit includes optical axes and lead screws, housings, linear guide supports, CNet stepper couplers, bearings logs, fully equipped to meet your needs. Made with quality materials, high wear resistance, low friction, high rigidity and long service life. The optical axis is suitable for various electronic equipment, transmission shafts, pillars. The bearing housing has a certain load capacity and has strong applicability. It can be mounted on ordinary precision racks. Small size, large transmission power, stable performance. Mainly used for industrial automation equipment, stepper motor rails. Such as 3D printers, engraving machines, XYZ module, slides, elevators, etc., are widely used. Features: Name: Slide rail set Descent path: Linear guide Material: 45 steel Safety class accuracy: H Slide Fixed Way: Locking Type, Locking Type Chrome Optical Axis: *8*400mm ZinKP08 Alloy Pillow Block Bearing: 55*13* 29mm SK8 aluminum rail shaft support: 42*32*14mm T8*8 (P2) stainless steel threaded rod with nut: 400*8mm SC8UU Slide rail: 8*34mm D19L25 Flexible Shaft 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:< /strong> 2* Chrome Optical Axis Zin2 Alloy Pillow Block Bearing2* KP08 4* SK8 Aluminum Rail Shaft Bracket 1* T8* 8 (P2) stem file stainless steel tee with nut 4*SC8UU slider 2*D19L25 flexible shaft coupling Note: 1.Allow s please some bit error due to manual measurement. please make sure you don't mind before you bid. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.