This is a Warmoth electric bass neck. I acquired it used with the intention of building a 6-string bass, but I haven't had the time to assemble it, so I'm putting it up for sale. If you're looking for good parts to build a bass, how about this? Nut width: 56.5mm End width: 78.7mm Fingerboard radius: 10 inches Thickness at 1st fret: 24.8mm, Thickness at 12th fret: 28.2mm The low-E string side of the joint has been filled with wood (see image). There are two truss rods, which is effective against twisting. The rods function, and there is currently no significant twisting. The fingerboard is made of black ebony, which is very rare these days. The neck has a 5-piece construction of hard maple and rosewood.