Features: 1) Uniformity in pitch, shape, color, luster and piece weight; 2) High lighting efficiency 3) Long life 4) Quick start-up Our advantages: 1) Complete tungsten industry chain (mine - powder - ingot - wire - filament) 2) Advanced equipment imported from Switzerland FALMA, South Korea & Japan 3) Passed ISO9002 in 1998 and ISO9001 in 2001 4) ISO14001 certification scheduled in 2007 Guaranteed accuracy: 1) Total length: ?.8mm 2) Coil length: ?.5mm 3) Leg length: ?.3mm 4) Piece weight: ?%mg 5) Cold resistance: ?%ohm