Yamaha Signature Series Roger Bobo Symphonic Tuba MouthpieceRoger Bobo is a legendary Tuba player who is said to have given the first ever tuba recital at Carnegie Hall. Before he retired from performing to devote his time to conducting and teaching, he was a member of the Rochester Philharmonic Orchestra, The Royal Concertgebouw Orchestra in Amsterdam, and The Los Angeles Philharmonic. His signature mouthpiece offers a big, warm sound and was designed to fill a concert hall. Rim Inner Diameter: 32. 90 Rim