Large Shank

24.54mm (0.966″)  Yamaha say: Slightly larger than the 45, this is also a good beginner’s mouthpiece

24.76mm (0.975″)  Yamaha say: The cup diameter and volume is slightly larger than the 46, producing a full, resonant tone. Also recommended for the…

24.38mm (0.960″)  Yamaha say: The semi-flat rim has a high point close to the center of the mouthpiece which allows for a great deal of flexibility…