cylindrical roller bearing +China direct supplier bearings +Gcr15&Gcr11 bearings +roller structure +12 years supply bearings cylindrical roller bearingour company is producing and export kinds of bearings, and ... : cylindrical roller bearing2) bore diameter :100mm-12003) precision level: P4, P5, P6, P04) sealing from : OPEN ,Z,ZZ, RS,2RS,2RZ5) material : chrome steel ...