Tungsten filament(lamp filament) can be used in ultraviolet lamp,VM lamp, is uniformity in pitch,shape,color,luster ... filament)made by qualifed tungsten wire, are widely used in ultraviolet lamp(VM Lamp),general incandescent lamp, energy-saving lamp, fluorescent ... ) Piece weight: ±3%mg3) Cold resistance: ±3% ohm Tungsten filament,ultraviolet lamp filament,lamp filament