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. Rosewood fretboard. Inlays: Birds (Small). Bone nut. PRS steel tremolo bridge with Gen-III hardware. Tuning Machines: Vintage 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. Satin finish.