Thank you for viewing. This is the [Shiro Ide Model 1 Mouthpiece]. It has a standard depth U-cup shape with a medium throat diameter and a thin, flexible rim. The cup is relatively thick, allowing for efficient sound production. This mouthpiece is particularly well-suited for instruments with a narrow bell, as it facilitates easy control of the high register. It provides a stable tone and comfortable playing experience in any condition. The high notes are easy to control, and despite its relatively compact size, it produces a dense tone. Inner Rim Diameter: 17.43mm Cup Shape: U-cup Depth: Medium Throat Diameter: 4.09mm