Trumpet mouthpiece. ■ Manufacturer: YAMAHA Yamaha ■ Model Number: 17B4N (Throat #26) ■ Finish: Silver-plated ■ Outer Box: Yes ■ Condition: Near new condition, only tried a few times. This is the Nakagawa model. I think it has well-considered specifications, such as the cup and backbore shape. If you are having trouble choosing a mouthpiece, please try it once; it might help you break through your current situation.