1) Purity: Of over 99.95% W 2) Quality: High tensile strength 3) Length: 500mm 1) Type & Application: TypeApplicationWBWB91Applied for high temperature-resistance tungsten wireWB61Tungsten wire for making GLS filament.WB31Tungsten wire for making tungsten heater element, electrode, lead-in wire, etc.WW2Electrode, contact, etc.W4Alloy additive 2) Chemical composition (%): TypeWFeOther elementsWB≥ ...