color:black Weight: about 63g [ART function]: The curve formed by the fingerboard, fret, and 1 to 6 strings and the load at the time of pressure display are flexibly changed to an optimal shape. Since it is possible to suppress strings with minimal pressure, tuning accuracy is improved, and billowing is suppressed. Be sure to check the detailed product description at the bottom and precautions before purchasing! To request a return or exchange, please note that it is mandatory to provide a video of the unpacking of the package.