Neewer&reg; 4 Sets of 6 String Acoustic Guitar Bone Bridge Saddle and Nut Made of High Quality Real Oxen Bone--Ivory 4 Sets of 6 String Acoustic Guitar Bone Bridge Saddle and Nut. Compatible with acoustic guitar Made of real oxen bone. Offers a better tone than plastic Features high density and minimal porosity that yield good intonation and clarity Lightweight design, exquisite appearance, and easy to use NOTE: Bridge Saddle and Nut ONLY! Other parts shown in the pictures NOT INCLUDED