Tungsten filament(lamp filament, tungsten heating filament) can be used in ultraviolet lamp,VM lamp, ... is uniformity in pitch,shap Tungsten filament(lamp filament, tungsten heating filament) made by qualifed tungsten wire, are widely used in ... variety of filament of single coil,coiled coil,triple coil,and non-standard filaments.Specification:1) Double coil: 110V-250V2) Triple coil: 110V-250V3) Main- ...