... excellent service SERIESBORE DIAMETER(MM)VARIANT STRUCTURE6180010-320Z,ZZ,RS,2RS6190010-280Z,ZZ,RS,2RS,N,NR,ZN,ZNR1600010-260 600010 ... -260Z,ZZ,RS,2RS,N,NR,ZN,ZNR620010-220Z,ZZ,RS,2RS,N,NR,ZN, ... ZNR630010-190Z,ZZ,RS,2RS,N,NR,ZN, ... ,2RS deep groove ball bearing1. with OPEN,Z,ZZ,RS,2RS,N,NR products2. wide varieties,inner packing ...