The PT-4011-00 is our new design of blank nut for Gibson style guitars and many acoustic guitars (3/16” nut thickness). It’s permanently lubricated.  All of our blank nuts are a little tall and a little longer (on purpose). As it is not slotted, final sanding and slotting is required. If you need better tuning stability and you want to make your own custom slots and spacing… this is your nut! Permanently lubricated with PTFE.