There are some marks on the shank. This is the latest Signature model, Sirius, by Willie's, for Yu Tamaki, a soloist who is active worldwide. It is a mouthpiece updated based on the 4.375 model of the conventional U3 Tamaki series. It is a wonderful mouthpiece that is exceptionally compatible with Shires trombones, as well as various American trombones. * "χ-METAL (Kai Metal)" contains more copper than the brass used in the standard specifications, and its specific gravity is also greater. The weight is also about 5% heavier. Retail price: 46,200 yen #trombone