The RG90BKP features a basswood body bolted to a maple and wenge Wizard neck with a 24-fret rosewood fingerboard with mother of pearl position markers. Components include a fixed bridge, dual Bare Knuckle custom humbucking pickups and Gotoh tuners. The RG90BKP is among the first nine-string guitars produced by Ibanez, along with the RG9QM.