Check the listing for details. Nut Bone Banjo 4 String 30.2mm x 6mm x 8mm. Color: Bone, Condition: New. Listed at 10.99 USD. Nut, Bone for Banjo 4 StringCarved Natural Oxen Bone30.2mm length (1 3/16") x 8mm height (5/16") x 6mm thick (just under 15/64")Pre-Slotted string locations.Specifications:Right Hand 4 string banjo setupOverall width 1 3/16" (30.2mm, 1.188")Carved Oxen Bone nut.Pre-slotted for standard string setupOverall thickness is 6mm (.236",15/64")Height is 8mm (.319", just over 5/16"String spread 21.7mm (55/64")Bottom edge is flatThis product is a carved oxen bone nut.Please note: due to the variations in banjo setups, you may need to sand or adjust this part to fit your specific banjo. There are a number of radius and bottom setups, widths and other details that vary from banjo manufacturers, if you have questions, please email us, we will try to answer your questions as to fit, we cannot guarantee fit for specific banjos, 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.