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. Medium rim diameter and cup volume for allaround playing. Good for ensembles and orchestras. Fairly dark sound. It has 16.5 mm rim inner diameter and 3.65 mm throat.