2014 AHP AlphaTIG 200X 200 Amp IGBT AC DC Tig/Stick Welder with PULSE 110v 200v quality TIG welding on aluminum, stainless or steel and precise welding of thinner-gauge materials will do 1/4" aluminum and 3/8" mild stee and 110/220 volts and is capable of welding 7018, 6013 Advanced Inverter Technology with PWM (Pulse Width Modulation) Using IGBT technology Square-wave inverter 4 aluminum welding with pulse frequency allowing for simple set up and operatin unit features HF start tig and includes a foot pedal for great tig welding control and Operation