Shape: wire Material: W>=99.99% Chemical Composition:W, K, Na,Li,U, Th Properties and Characteristics:TypeW(wt%) ... <0.1<0.5<0.05<0.0008<0.00080.2-50HW6N99.9999<0.07<0.5<0.01<0.0005 ... <0.00050.2-50Applications: Ultra high purity tungsten wire can be used to produce special lighting ... high-quality electronics, semiconductor, photovoltaic, military, etc. Ultra High Purity W Wire