This is a B♭ clarinet ligature, the Wood Stone KODAMA II. I selected this from several at a musical instrument store in Tokyo. However, I changed ligature brands soon after, so I'm selling this while it's still in good condition. It's like new, as I only played it during the trial and about twice after that. Personally, it makes tonguing easier, allows air to flow easily from high to low notes, produces a well-rounded sound, and greatly enhances the resonance of the tone. The part that touches the reed is made of grenadilla, and I personally find it to be lighter and easier to play than other companies' leather ligatures.