Check the listing for details. StewMac Bleached White Bone Nut, For Martin, Shaped, 1-13/16" Length. Color: Black, Size: 9.5, Condition: New, Style Code: FY6022. Listed at 16.47 USD. For Martin® and classical guitars Shaped; angled bottom 1-13/16" x 3/8" x 1/4" (46.04mm x 9.53mm x 6.35mm) 18" (457.2mm) top radius Stewart-MacDonald is your source for quality bone! Bone's hardness and density contributes to good tone, it polishes well, and it allows more precise slot filing. Bone is traditionally preferred for making nuts and saddles on quality instruments. Shaped nuts will save you a LOT of work—a head start for the novice builder, and a bonus for the busy repair shop where time is money! The dimensions have been carefully researched, and minor trimming, slotting, and sanding are all that's needed to fit most popular guitars.Bone's hardness and density contributes to good tone, polishes well, and allows for precise slot filingShaped saddles save you a lot of time and work; usually only minor trimming, slotting, and sanding are all you'll need to doReady for trimming, filing, sanding and slottingMeasures 1-13/16" x 3/8" x 1/4", with 18" top radius