Carries an Issued US Patent on the diffuser design has an inside diameter of .750" and is recommended for DC polarity applications only. It uses anywhere from 20-30 + CFH of Argon flow. It is recommended for 3/32" tungsten size and carries a 180 amp rating on constant amperage. It can go higher if using pulse settings. It is hand made in the USA of Borosilicate laboratory grade glass. Due to the nature of the Glass “Walking the Cup “ is not suggested.
Fupa 12 is recommended for Mild steel, Stainless steel, Chromoly, Titanium, inconel and other space grade alloys. It works best on thinner / smaller applications such as header tubes and chassis tubing.