Tantalum Wire and Ribbon is corrosion resistant and has good thermal conductivity. Some of its uses is in the manufacture of heating elements, vacuum tubes and other high temperature parts
VG Mass Spec filaments by SIS - three and five coil.
Bayard-Alpert Design and Dual Tungsten or Burn-out Resistant Iridium
For coating threads on fittings.
Buy tungsten wire, ribbon for mass spectrometer heaters here. Choose from varying thickness, Tungsten filament wire sold by the foot.
Rhenium Wire and Ribbon is used to manufacture filaments for mass spectrometers and ion gauges as well as medical applications.