Trumpet mouthpiece, Patrick RR78M! It offers a moderate resistance, excellent endurance, better projection, and stable high range. The rim is a rounded rim, similar to the cushion-like C rim of a Jet Tone. It has a high point slightly inward, designed to prevent the lips from easily entering the cup. Please refer to the size chart at the end of the photos! It comes with a box, but the condition is not good, so please consider it as a bonus.