This is a mouthpiece that the current Dynasty company previously sold as a System Blue mouthpiece. The appearance is significantly different from the current System Blue mouthpieces. It was also made as a euphonium mouthpiece, so it has a fairly deep cup. It is a large size. I mainly used it on trombone. Like its heavy appearance, it allows for a powerful sound. In my environment, it overpowers other instruments, so I've decided to switch to a different mouthpiece. I think it's a rare mouthpiece that's not easily obtainable. Please consider it if you're interested. Regarding price reduction, please feel free to consult, and I will accommodate to some extent.