This is the top of an AR Resonance trumpet mouthpiece. Inner diameter: L (equivalent to Bach 1-1/4) Cup depth: B (deep) Material: Brass The deep cup is suitable for a dark sound. Even with the deep cup, the pitch doesn't waver at all. There are no scratches or dents. I tried it for about a week, so there are very slight scuffs on the rim (not noticeable to the lips), but there are no problems when playing. New domestic price: 23,320 yen