This is a guitar nut made from buffalo horn, a rare material. The sound quality is similar to bone, but buffalo horn has a softer feel. So, you can't go wrong choosing it based on appearance. Please check the size in the photos. The string spacing is approximately 7mm. The bottom surface is straight. If you wish, I can ship it soaked in oil. On a personal note, the sound of the Graph Tech nut on my old TOKAI TALBO wasn't great, but when I switched to a buffalo horn nut, the unpleasant quirks disappeared, and it became an easy-to-use guitar. #gibson #fender #PRS #Epiphone #zemaitis #ESP #Gretsch #Rickenbacker #Suhr #tokai #Fernandes #Fujigen #Greco #electricguitar #guitarparts #guitarrepair #guitarcraft