I purchased this cornet mouthpiece because I wanted to try one with the same cup as the Schilke 14A4a, which is famous for its lead mouthpieces. (The 14A4X is on the left in the photo, and the 14A4a is on the right.) -------------------- ＜Catalog Specifications＞ ・Cup Inner Diameter: 17.09mm ・Throat: 27 ・Features: Based on the popular 14A4a, the adoption of a large "X" backbore provides a very open playing feel. Enhances the playing feel and tone of a Silky piccolo trumpet. Also suitable for E♭ cornet. -------------------- The item has only been test-played a few times and is in almost new condition. The original box is also included, so I will sell them as a set. The item will be wrapped in bubble wrap and shipped via Yu-Packet Post Mini.