Featuring Rossi’s latest Semi-Zener iGBT DC inverter technology, you’re assured an instant start followed by boosted output and improved duty cycle for longer. With an efficient pure copper toroidal transformer and output current adjustable between 20A and 300A, you can achieve a quality smooth weld finish whether it be with steel, stainless steel or cast iron. The Rossi is well suited for outdoor and even windy conditions, and is forgiving when working on dirty or rusty metals. This awesome unit is capable of running a wide range of electrodes, and an advanced cooling system with large fan ensure dissipated heat effectively easily for superior performance and durability. The features of the transistor bridge combine to make a continuous current rectifier - the high speed and precise regulation with high welding current continuity produce superior results with both general stick electrode and special purpose rods. Whether you're welding at home or work, the 300Amp MMA inverter welder will give you a quality weld every time. This also applies to orders canceled when the item has already been dispatched from our warehouse. The item must be in a re-saleable condition to qualify for a change of mind refund.