Feature: 1. Steel Wire Retainer Structure and No Ball Fall: Linear motion block is using steel wire retainer structure, effectively prevent steel ball falling off. Practical and safe. 2. High Position Accuracy: This linear motion bearing block adopts high position accuracy and comprehensive sealing system. With high load bearing capacity and automatic aligning ability. 3. Low Friction: Linear motion block has low friction and is flexible, no burr and simple to install, friendly to novices. 4. Low Noise: Our linear motion rail bearing block is in high speed and low noise, also fluent sliding without sticking. 5. Bearing Steel Material: The bearing slide block is made of bearing steel, which is perfect for 3D printing, wind, solar, CNC, robot, automation and other equipment. Specification: Item Type: 3D Printing Bearing Slide Block Material: Bearing Steel Use: Widely used in various industrial fields such as machine tools, engineering machinery, robots, reducers, steel, metallurgy, textile, mining, printing, etc.. Package List: 1 x Linear Motion Rail Bearing Block