Bach Cornet Mouthpiece 18C 中古 (Used) One-owner item (me). However, I have used it for many years, so there are fine scratches here and there. Therefore, I will auction it from a bargain price. Inner Diameter: 15.1mm Cup: 18C Rim: Flat Wide ※The rim is thicker than other mouthpieces, so it is stable, and it is less tiring even when pressing against the lips. I think this size is rare for a cornet. If anyone is interested, how about it? Thank you very much. m(_ _)m