Amazon.com: Metallor 8 String Graphite Guitar Nut Pre-Slotted Top Nut for Electric Guitar or Acoustic Guitar Black 54 x 9 x 6mm Set of 2pcs. : Musical Instruments
Model 1354-00 Nut Slotted L54.40mm | Graph Tech Guitar Labs
MORTone Electric guitar to 8 string mandocello conversion nut, octave mandolin,
Replacement nut for 8-string | .strandberg* Guitars