High quality guitar saddle and nut of bone is harder and lasts much longer than palstic , it can increased brightness and even added bass The Sand Paper let you can adjust the high of your saddle and nut anytime, you can use it polish the finger board, fret, side, strings etc The soft clean cloth can wipe the sweat on the strings after you play the guitar(Random Color) Good accessories for Acoustic Guitar Material: Buffalo Bone & Sand Paper & Cloth Size Chart: Saddle Length: Approx. 7.2 cm/2.83 inch Nuts Length: Approx. 4.2 cm/1.65 inch Sand Paper(L x W): Approx. 9.2x5.7cm/3.62x2.24 inch Clear Cloth(L x W): Approx. 18x14cm/7.09x5.51 inch Package Includes: 1 Piece Guitar real bone nut 1 Piece Guitar real bone saddle 9 Pieces Sand Paper(3 pieces 320 grit, 6 pieces 240 grit) 1 Piece Cleaning Cloth Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item Due to manual measurement, there may be 1-2mm error in size