... 3.prompt delivery 4.22years experiences SpecificationsRHR cylindrical roller bearings have Brand SKF,NSK,FAG,HTZC bearings with ISO9001:2000 quality, good quality, service, ... so on SeriesSeries 30200, 30300, 32200, 32300, 33000, etc. Ring MaterialChrome Steel, Carbon steel, Stainless steel Tolerance gradeGB/T307.1 ... 2200(E)120-1000FCDP400-1000 2300(E)120-1000 single row cylindrical roller bearings