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 allaround usage and are available in over 100 configurations. Even deeper cup than the 17C4 for an exceptionally dark, heavy tone. Good for symphony orchestra players who prefer a mellow sound. It has 17.3 mm rim inner diameter and 3.65 mm throat. Zemlja podrijetla : Kina