... .20g/cm3 3. Certificate: ISO 9001 2000 Light Filament/ Lamp WireSpecification:1. Material: tungsten wire/ tungsten alloy wire2, Purity: >= ... fluorescent lamps, high pressure halogen lamps. For making other lamp components. For production of filaments for lamps of coiled ... -coil or three-coiled incandescent lamp, fluorescent lamp, halogen lamp, auto lamp and hi-color temperature lamps,etc. For ...