This standard series features a standard brass mouthpiece. It offers a smooth attack and easy control. We offer a diverse lineup to suit every style. BB-67C4: This all-around model is ideal for Bb and C clarinet clarinet instruments. It produces a rich, full-bodied sound with a consistent, mellow tone. Rim inner diameter (mm): 32.06 Throat diameter (mm): 8.10 This all-around model is ideal for Bb and C clarinet instruments. Features: This standard series features a standard brass mouthpiece. It offers a smooth attack and easy control. We offer a diverse lineup to suit every style. BB-67C4: This all-around model is ideal for Bb and C clarinet clarinet instruments. It produces a smooth, mellow tone with a consistent, mellow tone. Rim inner diameter (mm): 32.06 Throat diameter (mm): 8.10 ■ Management code: 4960693150092 Category: Musical instrument accessories Mouthpieces for tuba and other brass instruments Instruments, crafts, and collections Instruments and equipment Tuba Tuba supplies JAN/ISBN code: 4960693150092 Product code: mt0005085