1)ball bearings:6000,6200,6300 series; 2)ABEC-3,5;Z2V2,Z3V3; 3)ISO 9001:2000& ... for visiting our website here! No.1: Bearings JYB can supply you:1).6000 Series: 606,607,608,609,6000,6001,6002 ... ,6004 --- Open, ZZ(Steel Shields), 2RS, UG, 2RZ;2).6200 Series: 626,627,628,629,6200,6201,6202,6203,6204,6205 ... partner in the coming future, thanks again! JYB 608 2RS Deep Groove Ball Bearings