one way needle bearing:1,ABEC-3,5;Z2V2,Z3V3 2,High ... 4,Noise level:Z1,Z2 5,C2,C0,C3... one way needle bearing,Lily bearing is a specialized manufacturer of needle ... both radical and axial loads.We are good at producing K, NA, NKI, NAV, NAOV, RNA series and other series ... needle roller clutch, HF, HFL Needle roller and cage assemblies, K, K...ZW Needle roller and cage assemblies, rod use KZK, KBK ...