... 3,End cover:ZZ,RS 4,Noise level:Z1,Z2 5,C2,C0,C3... Lily bearing is a specialized manufacturer of ... ,Rubber Seals,2 Metal Shield2),Tolerance codes: ABEC-1, ABEC-3, ABEC-5, ABEC-73),Vibration level codes: V4, V3, V2, V14),Internal clearance ... codes: C0,C2, C3, C4, C55),Material: AISI52100 ...