This is a new brand launched in the spring of 2025 by Masaki Taguchi, who was at Willie's Custom Brass. It's for tenor trombone with a large bore, and is the standard size 5GS. 【Specifications】 Inner rim diameter: 25.50mm Throat: 6.80mm Silver finish Cup: Medium I used it for about two weeks, but decided to choose a different mouthpiece based on an overall assessment, so I'm selling it. There are tiny scratches on the shank. Please check the photos. Thank you.