Trumpet mouthpiece - produced using the most advanced computer design and manufacturing technology. Standard Series mouthpieces feature unmatched precision, smooth attack, secure control, and easy playability. They have the ideal weight for all-around usage and are available in over 100 configurations. Extremely small inner rim diameter. Flat and wide. Small cup volume. Ideal for lead trumpet. It has 15.9 mm rim inner diameter and 3.65 mm throat.