single row deep groove ball bearing 6204 :1,ABEC-3,5;Z2V2,Z3V3 2,High speed 3,End cover:ZZ,RS 4 ... ,Noise level:Z1,Z2 Lily bearing is a specialized manufacturer of single row ... Metal Shield 2),Tolerance codes: ABEC-1, ABEC-3, ABEC-5, ABEC-7 3),Vibration level codes: V4, V3, V2, ... Shield Bearings Rubber Seals Bearings Teflon Sealed Bearingssingle row deep groove ball bearings