Bearing,Ball Bearing,Deep Groove Ball Bearing:A: Inner Ring Bore Diameter from 1mm-200mmB: Bearing range:1)60series: 602-60402)62series: 623-62403)63series: 633-63404)64series: 6400-64305)67series: 6700-67286)68series: 681-68309)69series: 691-693010)618series: 61800-6184011)619series: 61900-6194012)16000series,62200series, 62300series13) Inch series(Rxxx), Metric-Flange(Fxxx, MFxxx), R-Flange(FRxxx)C: Models: OPEN, RS, 2RS, RZ, 2RZ, Z, ZZ, N, M are all available.D: Precision Grade: P0, P6, P5, P4 are all available,EMQ motor quality, High Speed, Long LifeE: Low noise and low vibration: Z1, Z2, Z3,V1,V2F: Raw Material: Gcr15 Chrome Steel, Stainless Steel AISI440C, Ceramic Si3N4.