Thank you for viewing. This is a standard 48 size mouthpiece for large-bore trombones, purchased new in July 2024. I used it for about six months. It can also be used for euphoniums. Mouthpiece for trombone/euphonium (large bore) 48L I used it a few times at a Yamaha music school, but I quit soon after, so I'm selling it. When shipping, there will be no case, so please understand that it will be shipped with packing materials I have at home, such as bubble wrap. *Please understand that this is a used item.