This is a D'Addario Reserve X5 mouthpiece for Bb clarinet. D'Addario is an American musical instrument accessories manufacturer that produces and sells reeds, mouthpieces, and other products for woodwind instruments, and is widely used in Japan. This model is the Reserve X5. It is manufactured from hard rubber using machine milling, and is a highly accurate mouthpiece due to its machine production without human intervention. It is very easy to produce sound and the intonation is easy to adjust. I purchased this mouthpiece this year and used it a few times, but I am selling it because I have fewer opportunities to play my instrument and I also own other mouthpieces. I think the total usage time is only a few hours. I have uploaded many images. I purchased this as an outlet item due to long-term storage, so there was some cloudiness and discoloration overall from the time of purchase. The table and tip appear to be relatively clean with no noticeable scratches. I have cleaned it with mouthpiece cleaner before listing it. The images are taken after cleaning. Please understand that this is a used item, and make your decision based on the images and usage frequency. Please refrain from purchasing if you are overly concerned about the condition. I work during the day, so I will mainly respond in the evenings, but I will respond as quickly as possible. Thank you.