1、HARD MATERIAL: Linear bearing adopt Gcr15 bearing steel material, bainite thermal treatment process, with enough hardness, higher accuracy 2、STURDY AND DURABLE: Round flange linear ball bearing after high strength manufacturing, durable, has strong bearing capacity, good processing accuracy, enhance service life 3、HIGH SPEED AND LOW NOISE: Bearing has high speed, low friction torsion, low noise, and not easy to burn, in line with high requirements for use 4、APPLICABLE SCENARIO: Circular bearings can be used in transmissions, instruments, motors, household appliances, internal combustion engines, traffic vehicles, agricultural machinery, construction machinery, construction machinery, etc. 5、EASY TO USE: Base shaft support size is 20mm, with smooth surface, easy to operate, give you a better use experience