Flugelhorn mouthpiece. I purchased this from a musical instrument store about six months ago for around 8000 yen. I've used it about five times, including for performances. The rim is flat, which makes it comfortable on the lips, and the cup is deep, which I really liked the tone of. However, it doesn't fit my instrument's shank, so I'm selling it. The description said it was a trumpet shank (German shank). Thank you.