Designed for Alan Baer, principal Tuba New York Philharmonic. Alan designed this mouthpiece to be a perfect balance of sound, control, and functionality. At home in the largest orchestra and designed as the only mouthpiece you will ever need on CC tuba. This mouthpiece delivers rich focused overtones with great projection, easy articulation, and consistent pitch throughout the range of the tuba. Cup diameter 1.295,and throat diameter .321.