This item is no longer in production and may be difficult to obtain in the future, making it a valuable piece. The soft tone unique to the British style is its charm. With a medium rim and a deep cup, it's easy to play across the entire range. Rim Inner Diameter: 16.44mm Throat Diameter: 4.50mm Great for switching between trumpet and cornet! Please contact me if you would like to see any other areas in detail. I will add photos. There is no box, so it will be wrapped in bubble wrap for packaging. #Trumpet #Cornet #Mouthpiece