ST ELECTRIC GUITAR John Mayer Silver Sky Signature model. Inverted PRS blade design. Alder body. Bolt-on maple neck, 22 frets, 25.5? scale. Typical Mayer 635JM profile and 7.25? fingerboard radius. Maple Fingerboard Inlays: Birds (Small). Bone nut. PRS steel tremolo bridge with Gen-III hardware. TunersVintage Style with PRS locking design. 3 single pickups 635JM. Curved molded metal plate on jack connection. Redesigned potentiometers. Double action PRS core, accessible from the front of the blade for greater ease. Volume and 2 Tone controls, with a 5-position selector. Includes cover.