This is the Brass Lab.Momo Tuba Ambassadors model. I purchased it new and used it for about a week before storing it. Instrument tuning available → Photo 5 Purchase price: 60,500 yen Silver plated Inner diameter: 32.2mm Rim: Quite flat Cup: Shallow, but not too shallow Throat diameter: 7.5mm Cup shape: U-cup, slightly V-shaped at the throat entrance Shank: American Weight: 220g Tuba Tuba Mouthpiece