Medium and Large Sized Needle Roller Bearings: Two types: 1, Metal stamping(TLA, TA, ... =HK) 2, Steel plat(NA, TAF, TAF=NK) Medium and Large Sized Needle Roller Bearings :Two types:1, Metal stamping(TLA, TA ... ...Z...ZZUU-NART...R...VR,NART...UUR...VUUR Medium And Large Sized Needle Roller Bearings