we promise the bearing can secure 50.000 km 1.long used life. 2.lowest noise. 3.best serive. 4.superior quality. 1) ISO/TS16949:2009 certified 2)Suitable for OEM or Aftersales Market 3)Material: bearing steel Gcr15 4) ABEC-1 3 5 7We supply full range of auto bearings (include wheel bearings,wheel hub bearings)autobearings for various brand cars, truck,tailer, Such as GMC, Volkswagen,Nissan, Opel, ...