1.high quality tungsten wire 2.various types 3.pure wire and doped wire are both available 4.diameter: 0.2mm~1.38mm tungsten coil, tungsten filament,filament coil1.Tungsten coil,tungsten heater,tungsten filament are made of tungsten wires. Tungsten wire has high melting and good corrosion resistance. They are mainly used for vacuum metallizing, such as heating elements for chrome scope, mirrors, ...