The thinnest diameter of a tungsten needle that can be made depends on the manufacturing method used. Tungsten wires can be drawn down to diameters as small as a few micrometers using a wire drawing process. However, the thinnest diameter of a tungsten needle that can be made by a specific manufacturer may depend on the specific equipment and techniques they use. In general, tungsten needles with diameters ranging from 0.1 to 500 micrometers are commercially available.
