... the experience for making tunsten carbide milling insert(40,48,411)type for20 years , our recommended grade for making tunsten ... carbide milling insert(40,48,411)type Chinese Grade Equal to ISODensity(g/cm2)TRS ( ... of the milling blanks(30,38,311,40,48 and 411)and XTPUN,XSNUN,XSPUN,XFCUN and XLPUN-(EDR)(L) ... .6±0.25 tungsten carbide milling insert(40,48,411)type