Alexander horn mouthpiece NO. 8 Outer diameter: 25.5, Inner diameter: 17.5, Throat: 3.7, Cup: 28, Rim: 4 (mm) This is Alexander's standard mouthpiece. It was an accessory that came with an instrument I used to own, so it doesn't have a box. It will be wrapped in air cap for shipping. Although unused, some people may notice color changes due to aging.