tungsten bar 1,Purity:99.95%; 2,Surface state:Polishing,Black, 3,Package:wooden case or on request 1. Grade:W1,W22. Purity :>=99 ... : Mainly used to found ingredient of material, cutter and heads, tungsten wire for lights instruments and conductor of heat, crankshaft and ... to guns, artillery, rockets, satellite, airplane and ship. 99.96% w1 round tungsten bar