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, which homogenizes 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. Similar to the difference between factory-made instruments and those handcrafted by artisans, this process is labor-intensive but essential for 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. This is a natural effect, and Re:VIBRATION also adds 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 the sound, using 100% "copper," a characteristic material of gold brass. While the resistance is somewhat stronger, the resonance produced by copper creates a very elegant tone. By using brass for the ring part, the load is minimized while maximizing the effect. The ring part can also be made of copper as a separate option. STARLING SILVER A model using STARLING SILVER925, which is used for 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 part can be changed to brass or copper as a separate option.