The Ambu® Aura40™ is the world’s first reusable laryngeal mask to feature a built-in curve that carefully replicates natural human anatomy. This curve is molded directly into the tube so correct insertion is easy without abrading the upper airway. Aura40 also features a reinforced tip, which helps prevent folds during insertion that can cause improper positioning and possible airway leak. Convenient depth marks provide a visual indication of the mask position and the flat underside of the tube makes it easier to grip. In short, positioning is fast and accurate, each and every time. The Different Sizes are 1, 1.5, 2, 2.5, 3, 4, 5, 6.