Re:VIBRATION used item for horn. This item effectively returns the vibrational energy lost from the outside of the mouthpiece back to the instrument. When you attach Re:VIBRATION, you can feel the difference in resonance and vibration from your hands, lips, and ears, and it is expected to remove excessive tension and stress. By not tensing up: ・High notes become easier. ・Fortissimo becomes stable. ・The tone improves beautifully. ・Flexibility is created, enabling delicate expression. Purchased last September. The lineup has expanded now, and the price seems to have gone up considerably. How about trying it out? Details here: https://nachtmusik.theshop.jp/p/00001