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Our Pure Tungsten Wire comes in a wide variety of diameters from 0.0004” to 0.0600”. We take the greatest care to clean and straighten the wire. Smaller diameters are finished by electropolishing. All tungsten wire conforms to ASTM F288-96, Type 1A standards. This product is perfect for a variety of uses, including in medical devices, LEEP and LEED electrodes, corona generation vacuum, heating elements, filaments, and thermionic emitters.