Completely handmade, crafted using the same processes as musical instruments. When metal is bent forcefully, stress accumulates, hindering resonance. Re:VIBRATION is completely handmade and undergoes annealing to homogenize the molecular bonds of the metal, producing a stronger resonance. This is similar to the "〇〇 treatment" found in musical instrument stores, which improves sound. This process is akin to the difference between a factory-made instrument and one crafted by a skilled artisan. It's a time-consuming process, but essential for achieving optimal resonance. Preventing vibration loss, while also pursuing ease of use. Efficiently returning vibrational energy lost at joints and the mouthpiece back to the body of the instrument. This is a natural effect, and Re:VIBRATION also incorporates the effect of a ring. By adding a moderate resistance, not only is vibration transmission enhanced, but a core, powerful resonance is also created. And above all, it doesn't require the troublesome task of attaching it every time you use it. Simply insert it into the mouthpiece. YELLOW BRASS Uses brass, the same material as musical instruments. It enhances the bright and refreshing resonance that is characteristic of brass, without any sense of incongruity. COPPER BRASS This model uses 100% "copper," a characteristic material of gold brass, and emphasizes the luster and harmony of the sound. While the resistance is somewhat stronger, the resonance produced by copper creates a very elegant tone. By using brass for the ring, the load is minimized while maximizing the effect. The ring can also be made of copper as a separate option. STARLING SILVER A model using STARLING SILVER925, which is used in the silver material of many instruments. Silver produces a directional resonance, creating a sound that resonates to the far corners of the hall. The ring can be changed to brass or copper as a separate option.