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 metal's molecular bonds, producing a stronger resonance. This is similar to the "〇〇 treatment" found in musical instrument stores, which improves sound. It's the same difference between a factory-made instrument and one crafted by a skilled artisan. This process is labor-intensive, but essential for achieving optimal resonance. Preventing vibration loss, while also pursuing ease of use. Efficiently returning vibrational energy lost from joints and the mouthpiece back to the body of the instrument is a natural effect. Re:VIBRATION also incorporates the effect of a ring. By adding moderate resistance, it not only enhances vibration transmission but also creates a core, strong resonance. 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 prioritizes the luster and harmony of sound, using 100% "copper," a characteristic material of gold brass. While the resistance is slightly 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 musical 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.