1)deep groove ball bearing:6000,6200,6300 series; 2)ABEC-3,5;Z2V2, ... )C2,C0,C3 JYB: Original JYB 608 2RS Deep Groove Ball Bearing Manufacturer From Cixi, ChinaISO 9001:2000 Quality System & SGS ... : ABEC-3,ABEC-5;3).Vibration: Z2V2, Z3V3;4).Radial Play (Clearance): C2,C0,C3,C4,C5;5).Brand: JYB, CXJY ... the coming future, thanks again! JYB 608 2RS Deep Groove Ball Bearing