... bearings: Two types: 1, Metal stamping(TLA, TA, TLA=HK) 2, Steel plat(NA, TAF, TAF=NK) Precision needle roller bearings :Two ... types:1, Metal stamping(TLA, TA, TLA=HK)2, Steel ... the special requirements of bearing running clearance, inscribed circle and precision grade, please contact this company.Materials:Material for needle roller ...