... steel ball bearings, 4), Angular contact ball bearings, 7000, 7200, 7300, 3200, 3300,4200 series.5), Special bearing & un-standard bearing;6). Needle roller ... BK...)7). Cylindrical roller bearing(NJ, NUJ, NU, NNU...)8). Spherical roller bearing(22200 series, 22300 ... bearing(51100, 51200, 51300,,..)Hope to established long-term cooperation with you.KIndlly contact us for more information. one way bearing ...