Item Type: Guitar NutMaterial: Cow BoneSize: Approx. 53x7x3mm/2.1x0.3x0.1in 1Better Sound: With this nut, your guitar will produce clearer, richer and more stable sound for better performance. 2Improve Acoustic Quality: This nut can improve the overall level of four stringed instrument and play a role in improving the acoustic quality of the instrument. 3Selected Bone Material: This 4 stringed guitar nut is made of selected bone, which is more compact than those made of other synthetic materials. 4Pretty Shape: The bone nut is more sturdy and less likely to break, beautiful in shape, which could also decorate your guitar well. 5Simple Installation: This nut is ideal for replacing old or broken ones, easy to replace and install on guitar.