The Bach Baritone Mouthpiece is available in the following sizes: 12C, 6 1/2 AL Small Shank, and 6 1/2 AL Large Shank.
The Bach 12C baritone mouthpiece is one of the common mouthpieces for beginner players. It has a medium size cup depth. The mouthpiece brings out a brilliant, crisp tone. This model mouthpiece is great for all-around playing.
The Bach 6 1/2 AL small shank mouthpiece has a medium deep cup depth. This model mouthpiece is recommended for baritone/euphonium players who desire a round, mellow tone of great carrying power and substantial volume.
The Bach 6 1/2 AL large shank mouthpiece has a medium deep cup depth. This model mouthpiece has the same cup, throat, and backbore as the 6 1/2 AL small shank mouthpiece, but with a bass shank.