＊[Price adjusted for those requesting it] This is a mouthpiece for horn players, designed from scratch by SMS Craft Works. Cup Inner Diameter: 17.5mm Throat Inner Diameter: 4.0mm Depth: Shallow Rim: Thin ＊Made of solid brass. It will tarnish with use. This is a wonderful mouthpiece with excellent sound production from low to high registers. I am selling it because it doesn't quite suit my instrument. (Original purchase price: ¥15,400) Thank you very much!