Horn Mouthpiece Bach BACH 18 Model: Bach 18 Finish: Silver-plated Cup: V cup, medium Cup inner diameter: 16.15mm Rim thickness: narrow Shank: US This is a Bach horn mouthpiece. I bought it about a year ago, but it didn't suit me, so I'm selling it. This is the smallest of the Bach horn mouthpieces. It may be suitable for those with thin lips, those who lack stamina, or those who want to play without using much force. There are some scratches on the shank. Please feel free to contact me for additional photos or price reductions.