The MB-30 Bb Marching Baritone Horn from the house of Thomann is equipped with three Périnet valves that help eliminate sharp bends in the wind passage. These valves, thus, allow for appropriate pitch adjustments for the desired results. Such a set-up offers the benefit of smooth air flow. This instrument exhibits a bore size of 12.5mm and a bell size of 220.5mm. The brass construction of the body ensures immense corrosive resistance. The clear lacquered finish makes the MB-30 stand out amongst other instruments in your collection. The MB-30 is accompanied by a protective case for convenient portability.