... .abrasion and erosion high purity tungsten filament for heater element Diameter: 0.3-3mm tungsten purity ... , multi strandElectron beam tungsten filament:1.Used for vacuum evaporation metalizing.2.Life long,good at ... surface of mirrors, kinescope, toys, home appliance, machine and various decorations, etc. We can make different ... . 99.95% pure tungsten filament for vacuum coating (Stranded tungsten wire)