Fretless Jazz Bass neck used for harmonic point verification. The material itself is very heavy and has good grain, but unfortunately, the truss rod cannot be adjusted. (Almost straight at maximum) The fingerboard surface has been leveled and corrected under tension, but please understand that this is a junk neck. For those who want to try a fretless bass, or as an object, etc. Installation and other matters are at your own risk, no claims and no returns. Thank you.