Yamaha Trumpet Mouthpiece, Standard Series, B4 Cup Size, Yamaha Item TR11B4.
A somewhat shallow cup and medium rim for extra endurance. Brilliant tone. Suitable for D, Eb, and piccolo trumpets. Produced using the most advanced computer design and manufacturing technology, Yamaha's Standard Series mouthpieces feature unmatched precision, smooth attack, secure control, and easy playability. They have the ideal weight for all-around usage.