Trombone Mouthpiece for Tenor Trombone Willie's princesa Cup Inner Diameter: 24.75mm Bore Size: 6.3mm (Equivalent to Bach 7C) There are scratches on the shank from attaching and detaching the mouthpiece, but there are no scratches or dents that affect playing. Although it is a beautiful item, it is a used item, so please understand this before purchasing. ⭐︎Please also read the profile.