Features [High Speed and Low Noise] This linear motion rail bearing block is in high speed and low noise, also smooth sliding without sticking. [Comprehensive Sealing System] Linear motion rail bearing block is with high position accuracy and comprehensive sealing system. [Steel Wire Retainer Structure] Linear motion block is using steel wire retainer structure, effectively prevent steel ball falling off. [Low Friction and Flexible] Linear motion block has low friction and is flexible, no burr and simple to install. [Alloy Steel Material] The bearing slide block is made of alloy steel, with high load bearing capacity and automatic centering ability, which is perfect for 3D printing, wind, solar, CNC, robot, automation and other equipment. Specification: Item Type: 3D Printing Bearing Slide Block Model: HGH20CA Material: Alloy 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 3D Printing Slide Bearing Block Package List 1 x 3D Printing Slide Bearing Block