Martin 0-18 Guitar A welcome addition to the Standard Series, the new 0-18 has a scallop-braced Sitka spruce top with mahogany back and sides that serve as the foundation for this concert sized model. The combination of a short expressive 24.9” scale with a modified low oval neck shape and the high performance parallel taper allows for easy action and fast playability. Open geared nickel tuners with phosphor bronze strings and an ebony fingerboard and bridge complete the look of this classic parlor guitar. Specifications Overview BODY SIZE: 0-14 Fret FINISH TOP: Gloss CONSTRUCTION: Dovetail Neck Joint BACK & SIDE FINISH: Gloss BRACING PATTERN: X-Brace SCALE LENGTH: 24.9" BRACE SHAPE: Scalloped X with Non-Scalloped Tone Bars FINGERBOARD WIDTH AT NUT: 1 3/4'' TOP MATERIAL: Sitka Spruce NECK SHAPE: Modified Low Oval BACK MATERIAL: Genuine Mahogany NECK TAPER: High-Performance Taper SIDE MATERIAL: Genuine Mahogany ELECTRONICS: Optional RECOMMENDED STRINGS: Authentic Acoustic Lifespan® 2.0 Light - 92/8 Phosphor Bronze MA540T