From Fender:
Crafted at our Ensenada, Mexico, manufacturing facility, this genuine Fender Jazz Bass® guitar maple neck features a comfortable “modern C” profile and 9.5″-radius maple fingerboard with 20 medium jumbo frets.
The nut is pre-slotted with “pilot” string location grooves to make spacing a breeze when performing the final string slot filing, and a satin finish on the back offers smooth playability.
This replacement neck is for a Fender or Squier® by Fender bass.