This is a Denis Wick Steven Mead model mouthpiece. I'm selling it because the size didn't suit me. Rim Inner Diameter: 26.40 mm Cup Depth: Very Deep Throat Diameter: 7.40 mm Rim Shape: Slightly flat and wide (emphasizing stability and control) Backbore: Wide and free-blowing (allows for a full breath) Shank: Large shank Weight: Even heavier than the standard Ultra, "Heavy (H)" design Sound Characteristics: Core sound, powerful, and long-range projection Although the size didn't fit me, I think it produces a very full sound!