... material 2)Low noise, low vibration 3)Low price,good quality Good quality auto bearing 1)Chrome steel material2)Low noise, low vibration3 ... )Low price,good quality 4)Demension(d,D,B): 12mm,28mm,8mmsimple in strucure popularly used in many applications high limiting speed ... in both directions, in addition to radial loads, even at high speeds.Theay are available for low noise and low vibration ...