Description: 1.High quality string nut real bone,High quality sound and volume 2.Color:Unbleached (Flat Bottom,not Curved Bottom) 3.Dimension:42x3.5x4.8(mm) 4.String Spacing (E to E):35mm 5.Important note:you may need to sand or deepen the slots,and polish it when you install the nut Specification: Material:Real bone Size:Approx.42x4.8x3.5(mm) Weight:4g Package Includes: 3 x guitar nuts