Check the listing for details. Nut Flat Bottom 43mm 4 String Bass 16r Slotted Bone Left Hand 108716L. Color: Bone, Condition: New. Listed at 11.04 USD. Nut, Flat Bottom, 1 11/16", Left Hand, Bone43mm, for 4 String Base 16" radius, Left HandNatural Bone materialPre-Slotted string locations. Specifications:Left Hand 4 string bass guitar setupNatural Bone Material1.703" acoustic setup (43.3mm, just over 1 11/16")Bone nutPre-slotted for standard string setupOverall width 1.703" (just over 1 11/16" 43.3mm)Overall Depth is .235" (15/64" 6mm)Overall height at string 1 - 0.328" (21/64" 8.3mm)Overall height at string 4 - 0.353" (slightly under 23/64" 9mm)Upper radius (string) is approximately 16"String Spread 1.337" (1 11/32" 34.0mm)Bottom edge is flatThis product is a carved natural bone material nut.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.This Product may contain a chemical known to the State of California to cause cancer and/or birth defects or other reproductive harm.For more info go to www.P65Warnings.ca.gov