| Standard Series |  |  |  | 
| Model No. | Rim Inner Diameter (mm) | Throat (mm) | Characteristics | 
| BB-64 | 30.45 | 8.35 | Small      inner rim diameter with a   medium cup. An ideal beginner's model   for    young players. Well-balanced rim   configuration for flexibility   and    easy playability. | 
| BB-65 | 30.95 | 8.35 | Relatively      small inner rim   diameter and medium cup volume for easy    playability.   Excellent balance   throughout the instrument's range,    with a fairly   dark tone. | 
| BB-66 | 31.37 | 8.35 | Voluminous cup. Fairly dark tone   with plenty of power. Excellent resonance and clarity. Popular in ensembles   and orchestras. | 
| BB-66B | 31.37 | 8.35 | Shallower      cup than the 66.   Outstanding playability and flexibility. Fairly      bright tone and facile   response over a wide range. | 
| BB-66D4 | 31.49 | 8.87 | Excellent matching with Eb brass band instruments.   Very deep cup. Dark tone with plenty of volume. Symphonic sound. | 
| BB-67 | 31.93 | 8.35 | Exceptional rim and cup balance   for easy playability. Good match for Bb, C, and Eb instruments. Well-centered tone. | 
| BB-67B4 | 32.06 | 7.02 | Large      inner rim diameter with a   shallow cup. Easy playability with a     bright  tone. Particularly easy high   notes and clear lows. Perfect  for    F  instruments. | 
| BB-67C4 | 32.06 | 8.1 | A perfect match for Bb      and C instruments.   All-around versatility. Smooth, mellow tone      throughout the instrument's   range. Plenty of volume and power. | 
| BB-68B | 32.72 | 7.5 | Large inner rim diameter with a   small cup volume and throat. Enhanced clarity in large Bb and C tubas. | 
|  |  |  |  | 
| Signature Series |  |  |  | 
| Model No. | Rim Inner Diameter (mm) | Throat (mm) | Characteristics | 
| BB-BOBO-SOLO-GP | 32.2 | 7.5 | The      Solo mouthpiece features a   clear focused tone that sings and      projects, and is especially suitable for   solo performances and for use      with F and Eb tubas. | 
| BB-BOBO-SOLO-S | 32.2 | 7.5 | The      Solo mouthpiece features a   clear focused tone that sings and      projects, and is especially suitable for   solo performances and for use      with F and Eb tubas. | 
| BB-BOBO-SYM-GP | 32.9 | 7.5 | The Symphonic model is   characterized by a warm tone, big enough to fill the concert with rich   colorful sound. | 
| BB-BOBO-SYM-S | 32.9 | 7.5 | The Symphonic model is   characterized by a warm tone, big enough to fill the concert with rich   colorful sound. | 
| BB-SELF | 32.86 | 8 | Jim's mouthpiece embodies his   long experience of playing literally all types of music in highly demanding   situations. | 
| BB-CAROLINO | 32.44 | 7.5 | The      CAROLINO mouthpiece has the   ideal characteristics for all-around      usage. Perfect for both solo performance   and orchestral playing,  it     makes players feel comfortable in all registers   and has the  added     benefit of great versatility. |