Dennis Wick Euphonium Mouthpiece, size SM4 ☆ I bought this when I purchased a Besson euphonium, and it cost around 30,000 yen! I switched to a Silky mouthpiece after only a few months, so I didn't use it for very long ☆ Even when I wasn't using it, I kept it in its box in my instrument case, so the box has deteriorated, but the mouthpiece itself has only minor scratches and is in good condition ♪ Of course, it can also be used with a large-bore trombone!