Features Professional Kit - This kit comes with optical shafts, lead screw, lead screw nut, slide block, vertical slide block, flexible coupling, pillow block bearing for use. Strong adaptability: The optical shafts are suitable for guide rods, drive shafts and pillars of various electronic equipment, and the threaded rod can be widely used in machine tools such as 3D printing. Application: This kit is widely used in digital 3D coordinate measuring equipment, such as precision equipment or special machinery industry. Good load capacity: pillow block bearing has a certain load capacity and can be installed on ordinary precise racks, has great adaptability. Wear and Rust Resistant - Screw, guide shaft bracket and sliding block are made of high quality aluminum, with good wear resistance, not easy to rust, high precision and good strength. Specification: Item Type: Guide Screw Set Material Optical Axes: Steel Material threaded rod: Aluminium Flexible shaft coupling material: aluminum alloy Material support guide shaft: Aluminium Sliding Block Material: Aluminium Length of optical axes: approx. 400mm/15.7 inch Screw rod length: approx. 400mm/15.7 inch Flexible shaft coupling size: approx. 20 x 25 mm/0.8 x 1 inch Size of guide shaft bracket: approx. 40x33x14mm/1.6x1.3x0.6 inches Sliding block size: approx. 33x30x21mm/1.3x1.2x0.8 inches Package List: 2 x optical axes 1 x Lead Screw 1 x T8 Lead Screw Nut 4 x Vertical Sliding Block 2 x Flexible Shaft Coupling 4 x Sliding Block 2 x Zinc Alloy Ball Bearing Little tip: Please allow 1-3mm error due to manual measurement. Thank you for your understanding. Package List 2 x Optical Axes 1 x Lead Screw 1 x T8 Lead Screw Nut 4 x Vertical Sliding Block 2 x Flexible Shaft Coupling 4 x Sliding Block 2 x Zinc Alloy Pillow Block Bearing