Supply ball bearings used for motorcycle with good quality. Supply motorcycle bearings, using on the alternator and many other parts.1) Corresponding types: 6001, 6201, 6301, 6002-RS/P5, 16003, 6203, 6004, 6004D43, 6304B12, 62/28, 63/28-RS,160072) Model: open, Z, ZZ, RS, 2RS,2RZ 3) Tolerance level: ABEC-1 (P0), ABEC-3 (P6), ABEC-5 (P5), ABEC-7 (P4) 4) Noise level: EMQ V1 Z2, EMQ V2 Z3, EMQ V3 Z4, ...