Zero Glide ZS-23 Acoustic Guitar Nut for Gibson-Style Electric Guitar Kit Includes: 1 Bone Zero Glide Nut, 4 fret sizes, instructions Length: 45.7mm (1-51/64in) Width: 6.3mm (1/4in) Height: 8.5mm (21/64in) Spacing: 35.7mm (1-13/32in)