All our Supermig models are suitable for welding with CO2, Argon or CO2/Argon mix. Each uses a Forced Air Cooling System to slow transformer heating in order to increase duty cycle and a non-live torch to prevent the risk of accidentally striking an arc. All models are supplied with an industrial Argon/CO2 regulator. Welders are illustrated with gas bottles to give an indication of size only; gas is not included. A contract for the supply of gas should be arranged with your local gas distributor.