Thank you for viewing. This is a Silky piccolo trumpet mouthpiece. [Model] 14A4X [Cup Inner Diameter] 17.09mm [Features] Based on the 14A4a, the adoption of a large "x" backbore provides a very open blowing feel. Also suitable for E♭ cornet. I tried it several times, but it doesn't fit, so I'm selling it. There are some scratches on the shank, but there are no scratches on the cup or rim. It doesn't have the original box, so I will send it in another box. Thank you.