... , Steel plat(NA, TAF, TAF=NK) TLA Shell type needle roller bearings :Two types:1, Metal stamping(TLA, TA, TLA=HK)2 ... contact this company.Materials:Material for needle roller is GCr15 bearing steel, quench-hardening HRC60---65.Material for inner and outer races is GCr15 ... -NART...R...VR,NART...UUR...VUUR TLA Shell Type Needle Roller Bearings