... -3, ABEC-5, ABEC-7 2,Vibration level codes:V4, V3, V2, V1 3.Internal clearance codes:C0,C2, C3, C4 ... , ABEC-3, ABEC-5, ABEC-73)Vibration level codes: V4, V3, V2, V14)nternal clearance codes: C0,C2, C3, C4, C55 ... -2-MR74ZZ47---MR84ZZ48-2-MR104ZZ410-3- high-quality& high-speed / MF series / Miniature bearing