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| 40 / M | 40/64" Medium. All around mouthpiece with small diameter. |
| 41 / C | 41/64" Like Back 3C. All around general classical mouthpiece with small diameter. |
| 41 / ES | 41/64" Extra Shallow. Good commercial mouthpiece for lead work. |
| 41 / M | 41/64" Medium. Good all around mouthpiece. Warmer tone than "S" models. Often used as a crossover mouthpiece. |
| 41 / S | 41/64" Shallow. Excellent centered projecting sound. |
| 41 / SV 692s | 41/64" Shallow "V". Often used by players coming from Schilke 13A4a. |
| 42 / C | 42/64" Like Bach 3C. All around general classical mouthpiece. Warm, centered sound. |
| 42 / M | 42/64" Medium. Good all around mouthpiece. Warmer tone than "S" models. Often used as a crossover mouthpiece. |
| 42 / S | 42/64" Shallow. Our most popular model. Great for all around lead playing. Compact, centered projecting sound. |
| 42 / SV 692s | 42/64" Shallow "V". Used by lead players desiring a bright, focused sound. 692s backbore. |
| 43 / C | 43/64" Like Bach 3C. All around general classical mouthpiece. Warm, centered sound. |
| 43 / ES | 43/64" Extra Shallow. Great lead mouthpiece. Used by John Audino, 1st trumpet, Tonight Show 1965-1991 |
| 43 / M | 43/64" Medium. Good all around mouthpiece. Warmer tone than "S" models. Often used as a crossover mouthpiece. |
| 43 / S | 43/64" Shallow. Great for all around lead playing. Compact, centered projecting sound. |