Schilke Tuba MouthpieceSchilke Standard Series Tuba Mouthpieces are specially designed for BBb, CC, Eb and F Tubas (sousaphones) which require a standard (large) shank tuba mouthpiece. Chart of mouthpiece sizes Model : 62?? ?? ?? Diameter : 31. 85 mm?? ?? A superior standard mouthpiece with a good centered sound and easy response in the high and low register with good intonation. Also recommended for Eb or F tuba. Model : 66?? ?? ?? Diameter : 31. 52 mm?? Designed from the