black diamond (hematite) with high precision-cut natural stone insulator, has been tinged with beautiful luster of metallic black. Its physical properties Mohs hardness of 6, a specific gravity of 5, has a crystal structure of a trigonal consisting of Fe2O3, and combines high strength and high density properties.

Its tone is clear straight. While full of strong core force sensation, you do not have to feel the peak and dip. There is a display like a gem worthy of the high-fidelity playback.

is using the natural stone that has been carefully selected, in the domestic jewelry workshop, carved in one by one carefully by the hands of jewelry processing craftsman. Its surface emits a beautiful glossy finish in the mirror polishing, and combines the high flatness.

Size INS-CF / INS-SP / INS-US common coin size (φ20, H6) in, " INS-BS can snap it into". In combination with other "INS series", you can enjoy tuning of further tone.