Tungsten Filament used in Incandescent lamp,GLS lamp,is uniformity in pitch,shape,color,luster and piece weight, ... used in incandescent lamp, energy-saving lamp, auto lamp, halogen lamp,GLS lamp and other special lamp. Specifications:1) Single-coil: 36V-250V,1,000-5,000 hours2 ... ) Piece weight: ±3%mg5) Cold resistance: ±3%ohm Tungsten Filament,Incandescent lamp,GLS lamp