Check the listing for details. Nut Flat Bottom 1 5/8 41mm 12r Slotted Black 109309BK. Color: Black, Width: 41.25mm 1 5/8", Condition: New. Listed at 9.99 USD. Nut, Flat Bottom, 1 5/8", 41.25mm12" radius, Right HandBlack FinishPre-Slotted string locations. Specifications:Right Hand 6 string guitar setup1 5/8" acoustic and electric setupOverall width 1 5/8" (41.25 mm)Black molded plastic with glass reinforced acetal copolymer compounded that provides a lubricated surface for nut.Pre-slotted for standard string setupOverall width 1 5/8" (41.25mm)Overall thickness is 6.4mm (.252")Overall height at string 1 (high E) - 0.313" (slightly over 5/16")Overall height at string 6 (low E) - 0.315" (slightly over 5/16")Upper radius (string) is approximately 12"String Spread 1 3/8"Bottom edge is flatThis product is a formed acetal copolymer glass reinforced plastic molded nut.The plastic material is provides a pre-lubricated surface for smoother string action.Please note: due to the variations in guitar setups, you may need to sand or adjust this part to fit your specific guitar. There are a number of radius and bottom setups, widths and other details that vary from guitar manufacturers, if you have questions, please email us, we will try to answer your questions as to fit, we cannot guarantee fit for specific guitars, there are so many variations from year to year and model to model.You may need to adjust this product to fit your specific application.