Evaporation tungsten wire is used as vacumme material,cathode for emitting tube,high temperature electrodes,many specification are supplied Evaporation Tungsten Filament is mainly used as filament,cathode for emitting tube,high temperature electrodes,Tungsten wire in twisted,folded-heater for electronic tube,grid,gridsiderodelectron tube. These kinds of filaments are applied for vacuum coating and optical coating. tungsten filaments are made of selected high-quality material of tungsten, with the properties of excellent electrical conductivity, excellent thermal conductivity, finely processed. Diameter :0.55--2.0mm Number of strands : 1--10(strands) Shape and dimensin :according to customer`s drawing or sample. Attached labels indicate detailed production information Reeled on spools, Pack in cartons or cases or according to customers' requirements.