The following is a description from a manufacturer other than the seller. Trombone Mouthpiece, Large Shank, YAMAHA 48L Features a very well-balanced rim and cup with a narrow backbore. It has a high degree of completion and the ability to meet the advanced demands of professional musicians. Shimamura Music (musical instrument store) Reference Price: ¥8,580 For large shank Rim Inner Diameter: 25.25mm Throat Diameter: 6.62mm Similar to: Bach 6 Lightly cleaned. Will be shipped in a box with cushioning material. [Condition] Upon close inspection, there may be slight scratches, but they do not affect performance at all. There are no dents, so it can be used immediately. There is some slight dullness on the exterior. Although no particularly noticeable scratches were found, please refrain from purchasing if you are concerned, as this is a visual inspection by an amateur. Also, please understand that this is a used item.