The self-supporting arm DYNAMIC represents the best technical solution for the extraction of welding fumes, gas, oil fumes, dust, etc.. The polluted air is sucked in through the articulated hood, goes through the pipes made of sturdy sheet metal and thus it reaches the ventilator . The hood of the arm is joint by a special structure with spring balance , patented by us, made with springs, exible tube and boxed structure in high resistance, which allows a simple and comfortable movement, while the pipes have a new system of patented movement which greatly increases the maneuverability. The Dynamic is also equipped with a fth wheel that allows a rotation of 360 °.