Description: It is the head assembly of Professional PT31 Plasma Cutting Torch. It is compatible with standard of PT31 torch for 30-50A Plasma Cutting Machine. (i.e. CUT30, CUT40, CUT50, and some CUT60.) Rated cutting current 40A, rated maximum cutting thickness 12mm. Gas: Air. Gas Pressure: 4.5-5.5 Bar. Gas Flow: 150LPM. Ignition: HF.