SKF ball bearing 1.Material:Chrome steel/GCr15 2.ISO9001:2000 3.Accuracy:P0,P6,P5 4.super quality SKF Ball Bearing 6900Deep groove ball bearing feature1) Model: Open, Z, ZZ, RZ,2RZ,RS, 2RS 2) Quality level: reach the same level as the Japanese and European bearings 3) Tolerance level: ABEC-1 (P0), ABEC-3 (P6),ABEC-5(P5)4) Noise Level: EMQ V1 Z2, EMQ V2 Z3, EMQ V3 Z4, EMQ V4 5)Application: home ...