Tungsten Filament(lamp filament)can be used in auto Lamp,is uniformity in pitch,shape,color,luster and ... piece weight,long life We can supply a ... are widely used in incandescent lamp, energy-saving lamp, auto lamp, halogen lamp,GLS lamp and other special lamp. ... weight: ±3%mg5) Cold resistance: ±3%ohm Tungsten Filament,auto lamp