Characteristic
Bone is one of the popular material for string nuts. The color, “BLACK”, on this new series is impregnated deep inside to the core, not just appearance but also “black to the bone”. There are a few kinds of black string nuts in the market, but if you prefer the sound of bone nuts, this will be your first choice.
Examine
Checking how black inside by cutting some pieces.
Black color all the way through got proven.
Higher bone density might leave the marrow white.
