A great mouthpiece for the large orchestra setting! Designed for Alan Baer, principal Tuba New York Philharmonic, the Alan Baer Original CC tuba mouthpiece focuses itself on the perfect balance of sound, control, and functionality. Delivering rich focused overtones with great projection, easy articulation, and consistent pitch throughout the range of the tuba, this mouthpiece will be the only mouthpiece you will ever need for CC tuba. Cup diameter 1.295, and throat diameter .321.