Hobbyweld 5 is a specific blend of 93% Argon, 5% Carbon Dioxide and 2% Oxygen. Ideal for MIG welding of steel less than 7mm thick, such as car bodywork and thin sheet metal work. The Argon content results in low levels of spatter which in turn produces a great finish which requires less clean up time. The oxygen content provides good arc stability and the carbon dioxide provides the required depth of the weld. All in all a superb mix of gas for general MIG welding.