Tungsten Rod W-1(W>99.98%), Dia. :17.5mm Length ... Mainly used to found ingredient of material, cutter and heads, Tungsten Rod W-1(W≥99.98%),Purity: W≥99.98 ... advanced automobile, ingredient of kinds of heat-resistent steel and electrode, mainly used to guns, artillery,rockets, satellite,airplane and ... 0015Pb0.0001Sn0.0001Sb0.001As0.001Cd0.0001Mg0.0006C0.002Bi0.0001Mo0.003-- Tungsten Rod W-1(W>99.98%)