This is a Vandoren B♭ clarinet mouthpiece, Black Diamond BD4HD. It's a High Density model. The list price is currently 35,200 yen (including tax). HD models have been in short supply, but I selected this one from several at Dolce Music the moment they came in. Unlike the normal BD4, which tends to leak air, this one firmly receives the air and produces a clear tone. What's most surprising is the high-range overtones; it has a sharp, strong overtone component unlike previous Vandoren products. I believe this is related to the sound's projection, which professionals appreciate. When selecting this mouthpiece, I chose one that clearly exhibited these HD characteristics. I've played it for a total of only two hours since purchasing it after trying it out. There is no wear on the tip rail, but the logo is slightly faded in places due to the ligature. There are also small scratches from the ligature on the back. Please refer to the enlarged photos. There are no teeth marks because I used a patch. I purchased this at the same time as a BD5HD and decided to use that one, so I am selling this one. Includes the case and the red pouch to prevent discoloration. I apologize, but I will not negotiate the price. Thank you for your understanding.