1. HIGH LOAD BEARING CAPACITY: Linear motion block is using steel wire retainer structure, effectively prevent steel balls falling off. With high load bearing capacity and automatic aligning ability.2. PRACTICAL AND HIGH ACCURACY: This linear motion bearing block adopts high position accuracy and comprehensive sealing system. Practical and safe.3. NO BURR AND LOW FRICTION: Linear motion block has low friction and is flexible, no burr and simple to install, friendly to novices.4. FLUENT SLIDING: Our linear motion rail bearing block is in high speed and low noise, also fluent sliding without sticking.5. CRAFTED BY BEARING STEEL AND ALLOY STEEL: The bearing slide block is made of bearing steel, which is perfect for 3D printing, wind, solar, CNC, robot, automation and other equipment.