Bach Mouthpiece 5G (Large Shank) Selected by a professional euphonium player. Bach mouthpieces are the most widely used by professionals and beginners around the world. They can elevate a poor instrument and improve a good one. They offer rich volume, excellent intonation, good response from high to low notes, rich resonance, consistent tone throughout the range, and moderate resistance to prevent fatigue. Shallow G-style cup with a small throat and backbore. Suitable for high range, with a brilliant sound. The outer box is damaged. Cup: MD Rim Diameter: 25.50/MW Price negotiations are welcome. Please feel free to contact us.