Retail price: 15,400 yen Simply attach it to your mouthpiece to increase the volume and enhance its potential. I have used both the standard and hammered finishes, and the hammered finish provides a more natural sound with less resistance when blowing into it, resulting in a noticeable change in tone. Despite its small and simple appearance, it is finished with gold plating that is three times thicker than usual, at "10 microns," and is highly praised for its significant effect on the sound. The gold plate hand-hammered finish has a hammered treatment applied to the entire part, resulting in a bumpy surface. Compared to silver plate or gold plate, there is slightly more resistance when blowing into it, but the sound carries much further and projects exceptionally well. It transforms the sound into a rich and powerful tone that resonates throughout even the farthest corners of a large hall.