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. Clean bite and well-balanced rim for all-around playing. Standard model for beginners and advanced players. It has 16.46 mm rim inner diameter and 3.65 mm throat.