It's in beautiful condition with minimal signs of use. I purchased it used and have only tested it briefly. I was skeptical when I tried it, but the difference is astonishing. Official description below: Structure: O-type (open/closed) Width: 8mm Inner Diameter: 63mm Weight: 26g Material: White copper (80% copper, 20% nickel) Surface Finish: Gold plating Cushion Material: Choice of cork or EVA ■ Features The MellowTone Ring [Sonaria] is a versatile model with a balanced combination of quick response and rich resonance. Not only does it have a fast attack, but it also has a rich sound, providing a very comfortable playing feel. It offers high controllability, and the thick, solid core and outline of the sound improve the projection, giving the impression that your playing level has increased several notches. It is recommended for all players, regardless of musical genre, instrument ensemble, or playing style. ■ Characteristics of Cushion Materials 《Natural Cork》 • Natural and responsive, with a clear sound attack. • Ideal for jazz, pop, and other situations where crispness is desired. 《EVA Foam》 • Soft and enveloping, with a rich, expansive resonance. • Ideal for classical music, ensembles, and other performances that emphasize delicate expression.