Tumblebox 2800 bar | 30 LPM The PRO-JETTING Power Box is a tumble box designed for the simultaneous use of multiple high-pressure guns or lances on a single high-pressure unit. The tumblebox works with air pressure and ensures that the working pressure remains the same when one of the guns is not operated. Applications: Abrasive steel cutting, coatings and paint removal (bare steel), bundle cleaning, etc.