1、ADVANCED TECHNOLOGY: The bearings are made of excellent bearing steel through special heat treatment process, advanced manufacturing equipment and technology 2、DURABLE TO USE: The service life of the bearing is greatly increased, and the cost can be saved for the equipment with high requirements and difficult to disassemble 3、FAST WITH LOW NOISE: Possess low noise, high speed, high bearing accuracy, fast running speed, low friction torsion, and good rotation 4、ACCURATE MOTION: This ball bearing is durable and provides accurate low friction linear motion, widely used in 3D printers and CNC machines 5、WIDE APPLICATION: Also suitable for pearl cotton equipment, agricultural machine, robotic arm, construction machinery, manipulator, accurate instrument, factory equipment, engraving machine, 3d printer, textile machinery, automation equipment