Utopia Ceramic Ocean Blue Color / Pattern Alto C Key / 3 Octave Chromatic Range Ceramic Ocarina - High temperature Kiln Treated good Hardness Endurability Ceramic ocarina (High Kiln temperature controlled treatment) Triple Voicing Hole w. 3 octave range playing -- Alto C Key Hardened treated process Beautiful sounding, for professional players or person who want challenging this 3 octave for higher notes.