Atelier Tsubasa Trumpet Mouthpiece 2C This is a copy mouthpiece of the Mt. Vernon Bach 2C rim and cup, and backbore. Throat: 26 Please check the condition in the photos. There are shank marks, but it is generally clean. No box. Thank you. Quoting from the manufacturer: Mr. Kameyama's "MV 2C," loved by players around the world, both professional and amateur, was precisely measured using a super-precision contour measuring instrument to create a drawing in micron units, and then cut with a CNC precision lathe. ・Backbore The shape was measured from a backbore of an individual that has a clear sense of pitch and resonance, and can be played naturally. Selling due to a change in size. Please refrain from purchasing if you are sensitive to used items.