Trademark W1, W2, WAL1, WAL2 ,W-Ni-Fe, WMO50, WMO20 Dimension Dia(0.1~1.6)* ... property function,This product which is mainly put into electric light source, electronic device, lamp filament and taenidium use.Specification dia (0 ... .1-1.6)*L mmDensity W>99.92%Standard GB/T4181-1997 GB/T4181 W1 tungsten ...