Welcome to our store! 1. Kit Contents: Linear guide rail shaft kit includes 2 linear guide rail shafts, 4 SC8UU slide bearing blocks, 4 shaft supports, 1 lead screw, 1 nut, 2 vertical bearings, 2 flexible shaft couplings. 2. Low Friction Coefficient: The linear guide rail shaft kit is more durable and less noisy. Low friction coefficient and high track precision. 3. 304 Stainless Steel: The linear guide rail shaft is made of 304 stainless steel material, and the slide bearing block is made of steel material. 4. High Tensile Strength: The linear guide rail shaft kit has high tensile strength and is robust, corrosion-resistant, rust-resistant, and acid-resistant. 5. Wide Application: The linear motion rod shaft slide bearing block kit is applicable to industrial automation equipment and stepper motor control. Such as 3D printers, engraving machines, sliders, etc. Item Type: Linear Motion Rod Shaft Slide Bearing Block Kit Material: High Carbon Steel, Steel, Aluminum Alloy, Brass Application: Applicable to industrial automation equipment, stepper motor control. Such as 3D printers, engraving machines, sliders, etc. 2 x Linear Motion Guide Rail Shaft (Diameter 8mm-L Length) 4 x SC8UU Slide Bearing Block 4 x Shaft Support 1 x T8x8(P2) Length L Lead Screw 1 x Nut 2 x KP08 Vertical Bearing 2 x D19L25(5-8) Flexible Shaft Coupling Satisfaction Guarantee: Customers are our top priority. If you find any problem with the product, please contact the seller immediately. We strive to provide satisfactory customer service.