Blisstime 1 Set of Classical Guitar Buffalo Bone Saddle and Nut Premium Quality Bone nut size:52mm*6mm*9/8.5mm Bone saddle size:80mm*3mm*9/8mm Made of real buffalo bone material,which offer you a better tone than plastic. Great replacement bridge saddle and nut for your classical guitar. Many luthiers and guitar manufacturers prefer bone guitar nuts for their instruments. The bone we offer is oxen bone from China. This bone has minimal porosity and a great appearance. Its density and minimal porosity are features that yield good intonation and clarity.