The Bach Tuba Mouthpiece is available in three sizes: 18, 24AW and 7.
The Bach 18 tuba mouthpiece has a medium cup depth. This mouthpiece is great for all-around playing. It has an even register and substantial tone of excellent carrying power.
The Bach 24AW tuba mouthpiece has a deep cup depth. This is an excellent mouthpiece whenever a sonorous, dark tone quality of enormous volume is desirable.
The Bach 7 tuba mouthpiece has a medium cup depth. This is a large mouthpiece with full, lively tone and a splendid low register, for players with a strong embouchure. Recommended for large-bore instruments.