drawn cup needle bearings:1,ABEC-3,5;Z2V2,Z3V3 2,High speed 3,End cover:ZZ,RS 4,Noise ... level:Z1,Z2 5,C2,C0,C3... drawn cup needle bearings,Lily ... . Catalog index: Characteristic of China needle roller bearings Drawn cup needle roller bearings, HK, BK, HK 2RS, BK ... RS Drawn cup needle roller bearings, TA, TLA Drawn cup needle roller bearings, Inch size SCE, ...