Thank you for viewing this item from among many others! This is a Vandoren B♭ clarinet Black Diamond Ebonite mouthpiece, BD7 CM1007. I've used Vandoren M30 and B45 mouthpieces, but I bought this mouthpiece to try it out. I thought it produced a good volume, but I ended up sticking with the B45, so I'm putting this up for sale. I've only played it to test it out, so I think it's in beautiful condition. Also, it's a selected item by Mr. Yuto Kamei. Here's the manufacturer's description: The Black Diamond Ebonite mouthpiece features a new internal and external design, allowing for rich and deep playing, especially in the high register. This is a new type of mouthpiece that can resonate greatly in halls and other venues. It's a recommended mouthpiece for all clarinet players. For more details, please see the descriptions on sites like Nonaka Boeki. Please refrain from price negotiations.