Tungsten Filament(lamp filament)can be used in auto Lamp,is uniformity in pitch,shape,color,luster and piece ... ,and non-standard filaments. They are widely used in incandescent lamp, energy-saving lamp, auto lamp, halogen lamp,GLS lamp and other ... ) Piece weight: ±3%mg5) Cold resistance: ±3%ohm Tungsten Filament,auto lamp