shell type needle roller bearings:1,ABEC-3,5;Z2V2,Z3V3 2, ... 4,Noise level:Z1,Z2 5,C2,C0,C3... shell type needle roller bearings,Lily bearing is a specialized manufacturer of ... cage assemblies, K, K...ZW Needle roller and cage assemblies, rod use KZK, KBK Needle roller bearings without inner ring, NK ...