Application: Use with linear support blocks and enclosed sliders. Size: 8mm diameter and 100mm length motion guide shaft rod. Material: Made of C45 carbon steel, high-frequency quenching, chromium plating surface, durable and corrosion-resistant Material: Made of C45 carbon steel, chromium plating surface, durable and corrosion-resistant. They serve as support structures for linear bearings, allowing them to move smoothly and accuratelyApplication: Use with linear support blocks and enclosed sliders. High Precision: The straightness is below 0., 1/1000mm, and the hardness can reach 58-64 HRC. 3D Printer Linear Rod Uxcell 4 Pcs Linear Motion Rod 8mm X 200mm Case Chrome Plated Steel Rod Material: Material: Made of C45 carbon steel, chromium plating surface, durable and corrosion-resistant. uxcell 4 Pcs Linear Motion Rod Shaft Smooth and Precise Linear Movement: Linear motion rods are commonly used in industries such as automation, robotics, machine tools, and 3D printing.