ELECTRIC GUITAR ST John Mayer MODEL SE SERIES Silver Sky Signature. Alder body. Bolt-on maple neck. Rosewood fretboard. 22 frets. Scale length: 25.5. Original 635JM profile. Fretboard radius: 8.5. Inlays: small birds. 3 635JM S single-coil pickups. Synthetic bone nut. PRS steel tremolo bridge. Vintage Style tuners, non-locking. Double-action PRS truss rod, accessible from the front of the headstock for greater ease. Volume and 2 Tone controls, with 5-way selector. Inverted PRS headstock design. Includes gig bag. PRS Classic 1046 strings. Finish: Derby Red.