Tuned Thai Gong High Octave f' Used This is a used item, but I believe it is in much the same condition as when it was purchased new. I have played it with felt-wrapped, yarn-wrapped, and cotton-wrapped mallets. I have not used hard mallets made of metal or plastic. For reference, I have included images of the tuning measurements. As a characteristic of the instrument, it contains many overtones, and the pitch is not as precise as a keyboard instrument. Audibly, it sounds close to the indicated pitch. Please understand the above points and purchase with no returns or refunds.