Features Complete 3D Printer Kit: This comprehensive kit includes various essential components such as optical axes, lead screw, housing bearing, linear guide, CNC step couplers, and ball bearing, providing you with everything you need for your 3D printer assembly. Robust Bearing Block: The bearing block boasts high bearing capacity, strong adaptability, and stability, ensuring reliable performance and durability during operation, offering peace of mind for your projects. Precision and Efficiency: The T8 lead screw kit guarantees high accuracy, improving work efficiency and safety, making it an ideal choice for precise applications and projects that demand consistent and reliable results. Versatile Applications: Suitable for a wide range of uses including machinery industry, electronic equipment, guide rods, transmission shafts, and 3D printing, making it a practical and versatile solution for various applications. Durable Materials: Constructed with high-quality rustproof steel and aluminum, the kit is designed for long-term use, offering durability and wear resistance for sustained performance in demanding environments. Specification: Item Type: T8 Lead Screw Kit Optical Axes Length: Approx. 350mm / 13.78in Material: Steel Screw Length: Approx. 350mm / 13.78in Material: Aluminium Flexible Coupling Size: Approx. 20 x 25mm / 0.79 x 0.98in Material: Aluminium Alloy Guide Shaft Support Size: Approx. 40 x 33 x 14mm / 1.57 x 1.3 x 0.55in Material: Aluminium Slider Size: Approx. 33 x 30 x 21mm / 1.3 x 1.18 x 0.83in Material: Aluminium Package List: 2 x Optical Axes 1 x Lead Screw 1 x T8 Lead Screw Nut 4 x Vertical Sliding Block 2 x Flexible Coupling 4 x SCS8UU Sliding Block 2 x Zinc Alloy Bearing Block Bearing KP08 Note: Please allow a small error of 1‑3mm in the manual measurement. Thanks 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 Coupling 4 x SCS8UU Sliding Block 2 x Zinc Alloy Bearing Block Bearing KP08