Denis Wick DW4880-4BL Gold-plated Large Bore Trombone Mouthpiece 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. Ideal for solo playing. Excellent range with even tone production. Cup Diameter: 26.00mm. Rim width: 6.72mm. Throat: 7.12mm. Backbore: Medium. Large shank.