Yamaha designed the TR-14A4a Trumpet Mouthpiece specifically for lead trumpet and piccolo trumpet players. The mouthpiece features a shallow cup, so it’s easier to hit the high notes in your solos. Beyond the effortlessly playable cup depth, the TR-14A4a has a 16.68mm inner cup diameter. With its medium-flat rim shape, the expanded rim diameter allows a player to create an immensely powerful sound with relative ease.  The narrow backbore produces a brilliant tone with a super-comfortable resistance. Lead trumpet players who prefer the comfort of a larger mouthpiece are sure to love the Yamaha TR-14A4a Trumpet Mouthpiece.