Tungsten filament can be used in energy-saving lamp, it is uniformity in pitch,shape,color, luster and ... qualifed tungsten wire, are widely used in general incandescent lamp, energy-saving lamp, fluorescent lamp, auto lamp, halogen lamp and other special ... ,coiled coil,triple coil,and non-standard filaments.Specification:1) Double coil: 110V-250V2) Triple coil: 110V-250V3) Main-supplementary coil ...