Denis Wick mouthpiece for euphonium, Steven Mead Ultra Series, diameter: 37,92 mm, cup diameter: 25,40 mm, rim width: 6,30 mm, bore: 7,40 mm, backbore: V-type, heavier outer shape, a slightly more rounded cup and a slightly sharper inner edge to the rim, the sound is powerful, with a beautiful singing high register, medium shank, gold plated