... high pressure 2)easy to maintain 3)high-speed,silence. 4)good Quality Taper roller bearing1)supply ... high pressure 2)easy to maintain 3)high-speed,silence. 4)good Quality Materialchrome steel(GCR15) ... -33022,33109-33118,33205-33220.2)High-speed rotation,low-friction torque,low vibration and low noise.3 ... ,)5 deep groove ball bearing(mostly 6000 series)6.Auto Wheel Hub Bearings7,OEM Service8,China- made ...