Yamaha’s MP-14F4 Standard Series Mellophone Mouthpiece is a great choice for players of all skill levels from middle school and beyond. It comes with a very deep cup that’s reminiscent of a classic French horn mouthpiece. Beyond the comfortable depth, the MP-14F4’s cup has a 16.76mm diameter to help the player hit and sustain high notes with ease. Finally, the medium-flat rim shape provides excellent note definition and just the right amount of comfort.