... brands: SKF, NSK, NTN,, TIMKEN, KOYO, NACHI4)Chinese brands: ZWZ, HRB, LYC etc2.Double Row NN,NNU Series cylindrical roller bearing: NN 3005 K/SPNNU 4920 ... row full completement cylindrical roller bearings, mainly NNF designs6. Multi-row full completement cylindrical roller bearings, four or eight row of rollers. NN Series Cylindrical Roller Bearing nn3026