XO JAPAN 51D Cup Inner Diameter: 25.55mm Long Shank For large-bore euphoniums and trombones! Purchased 8 years ago and used for about a year. Will be cleaned before shipping, but there are dents. Please have it repaired yourself before use. Please understand that there is some wear and tear before purchasing. While having a deep cup, it provides a stable playing feel across the wide range required for the euphonium. Recommended for beginners. (Quoted from the Ishibashi Music website) Please comment if you have any questions!