Martin Guitars D-18 Retro dreadnought western guitar, solid Sitka spruce top, mahogany back, sides & neck, solid black ebony bridge & fingerboard, nut width 44,45mm, scale 645mm, 20 frets (14 clear), nickel open-geared tuning machines with Butterbean knobs, incl. fishman F1 aura plus pickupsystem, finish: polished gloss, incl. hardshell case