This is a "tone ring" that attaches to the bottom cap of valve casings on trumpets, cornets, etc., to alter the sound. Unlike those made from plated brass, the material is high-purity silver (sterling silver) used for rings, which has been hammered. This one has a distinct hammered texture and a multifaceted finish that creates a more visually impactful appearance depending on the angle of light. Attach it to your preferred location on the 1st to 3rd valve caps. Depending on your preference, the 3rd valve will likely show the most noticeable change. You'll get a change where the tone becomes more focused and the resonance expands. The photo shows it attached to a Bach. The slit allows for size adjustment, and it can be attached to instruments of standard sizes, such as Yamaha. *Please refrain from individual price reductions; we can discuss shipping costs if you purchase multiple items.*