Graph Tech Black Tusq PT-1578-00 slotted 12 String 3/16" nut
The PT-1578-00 is the perfect option to upgrade the nut on your twelve string guitar. It is pre-slotted for a quick and simple install.
Black TUSQ XL is engineered from the same material as TUSQ and is impregnated with PTFE which is five times more slippery than graphite. It has all the tonal benefits of TUSQ, bringing out the hidden harmonics of your guitar all while drastically improving tuning performance.
Black TUSQ XL is consistent from piece to piece, and within each piece, to offer you harmonically rich tones without the problems associated with natural materials.
 | Consistent quality |  | Impregnated with PTFE |
 | Black in color |  | Increased harmonic content |
 | Improved tuning |
| Measure | Length | Width | Height | E to E |
| inches | 1.897" | 0.195" | 0.325" | 1.630" |
| inches | 1 29/32" | 3/16" | 5/16" | 1 5/8" |
| millimeters | 48.18mm | 4.95mm | 8.25mm | 41.40mm |
Click here for the installation instructions and click here for 'how to measure your nut'Note: All Graph Tech nuts and saddles are slightly long and wide to ensure extra room to achieve a perfect fit for your guitar. This extra material can easily be removed with fine grit sandpaper.