... ) 2, Steel plat(NA, TAF, TAF=NK) NAXI1223Z Needle roller bearings :Two types:1, Metal stamping(TLA, TA, TLA=HK ... the choice of customers, such as narrow & broad series, with or without inner races, cages, ribs or ... grade, please contact this company.Materials:Material for needle roller is GCr15 bearing steel, quench-hardening HRC60---65 ... ...R...VR,NART...UUR...VUUR NAXI1223Z Needle Roller Bearings