... wire is spooled on clean, defect free spools. For very large diameters, Tungsten wire is self coiled ... filaments in incandescent bulb, fluorescent lamp, heating filaments, spring filaments, grid electrode, gas-discharge lamp,Specifications 1 ... before using. The Tungsten wire is not suitable for contacting with iron, nickel, carbon, when the ... preserved in dry vessels. tungsten filament for electronic gun