... specifications.Applications:1) Pure tungsten rods: used for producing twisted tungsten wire and tungsten heater, electron tube heaters etc.2) Tungsten-aluminum rods: production of ... cathodes, transmitting rods, heaters, high temperature resistant molybdenum foil6) Tungsten-zirconium rods: electron tube cathodes, transmitting rods, heaters, high temperature resistant molybdenum ...