Deep groove ball bearing size:6000,6200,6300,6400series material:bearing steel, GCR15 precision:ABEC-1 hardness:59-63HRC bearing 6100product detail description:1) Types: 60 series, 62 ... : Z1, Z2, Z3, ZV1, ZV2.ZV3.Z1V1.Z2V2.Z3V3. 6) Precision level: ABEC-1, ABEC-3, ABEC-5, ABEC-7. 7 ... sincerely want every customer to establish friendly relations of cooperation. deep groove ball bearing 6100