Free and resonant highs. Ideal for principal players. Denis Wick develops his trombone mouthpieces to help players achieve clarity, warmth and beauty of sound that no other manufacturer has been able to duplicate. His attention to detail and dedication to his craft has brought intonation and flexibility to near perfection, creating the highest standard in trombone mouthpieces. Cup diameter: 25.75mm. Rim width: 6.64mm. Throat: 6.87mm. Backbore: Medium. Small shank.