... types: 1, Metal stamping(TLA, TA, TLA=HK) 2, Steel plat(NA, TAF, TAF=NK) TLA Caged type needle roller bearings ... :Two types:1, Metal stamping(TLA, TA, TLA=HK)2, Steel plat(NA, TAF, TAF=NK). ... relevant recommendation in the applied technology of rolling bearings.TLA...Z*TLAM,TA...Z*TAM,BA...ZOH*BAM, ... ...ZZUU-NART...R...VR,NART...UUR...VUUR TLA Caged Type Needle Roller Bearings