MR Series bearingsType: MR SeriesNumber of row: single rowCorresponding models: MR63~Material: Gcr15 (chrome steel) China, (AISI)52100 American, (Din)100Cr6 Germany, AISI440C, AISI304, AISI316Shield/closure: plain(Open), Z, ZZ, RS, 2RS, UGVibration and noisy level: Z1, Z2Tolerance codes:...