The kit includes optical shafts and lead screws, housings, linear guide brackets, CNC stepper couplers, and ball bearings, fully equipped to meet your needs. Made from high-quality materials, offering strong wear resistance, low friction, high rigidity, and long service life. Suitable for industrial automation equipment and stepper motor rails, such as 3D printers, engraving machines, XYZ modules, slides, and lifts. Features: - Includes optical shafts, lead screws, housings, linear guide brackets, stepper couplers, and ball bearings - Constructed with durable materials for reliable performance - Optical shafts suitable for various electronic devices, drive shafts, and support pillars - Bearing housings provide good load capacity and broad applicability - Can be mounted on standard precision brackets - Compact design with high transmission efficiency and stable operation Main applications: industrial automation, 3D printers, engraving machines, linear motion systems, slides, and lifting devices. Specifications: - Name: Sliding Rail Set - Glide Path: Linear guide - Material: 45 Steel - Accuracy Class: H - Drag Fixing: Locking type - Optical Shaft: Chrome-plated, 8 x 400mm - Bearing Block: KP08 Zinc Alloy - Block Bearing: 55 x 13 x 29mm, SK8 - Aluminum Rail Shaft Support: 42 x 32 x 14mm - Lead Screw: T8 x 8(P2) Stainless Steel, 400 x 8mm with Nut - Bushing Slide: SC8UU, 8 x 34mm - Flexible Coupling: 5 x 8mm - Item Size: 410 x 75 x 30mm (16.14 x 2.95 x 1.18in) - Item Weight: 867g (1.91lb) - Package Size: 500 x 100 x 50mm (19.69 x 3.94 x 1.97in) - Package Weight: 900g (1.98lb) Package Contents: - 2 x Optical Shaft (Chrome-plated) - 2 x KP08 Zinc Alloy Bearing Block - 4 x SK8 Aluminum Rail Shaft Bracket - 1 x T8 x 8(P2) Stainless Steel Lead Screw with Nut - 4 x SC8UU Bushing Slide - 2 x D19L25 Flexible Coupling Note: - Slight measurement deviations may occur due to manual measurement. - Color may vary slightly due to lighting and monitor display differences. - Actual product received should be considered the final reference. - Delivery includes items as shown in the main image.