... /wooden packing 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. ... ≤0.002≤0.05W4≥99.90≤0.005≤0.1 tungsten carbide welding rod