These calculators are a good place to start and usually include additional information, such as recommended shield gas flow rate and amperage, but you will need to test to be sure.Figure 2This 10N series collet and collet body are shown with a Teflon gasket.Figure 3This 13N series gas lens collet body and collet are shown with an alumina nozzle and Teflon gasket.Nozzle NotesGTAW nozzles are measured