Fingerboard Material: Solid Black Ebony Scale Length: 25.4” Number Of Frets Clear: 14 Number Of Frets Total: 20 Fingerboard Width At Nut: 1-11/16 Fingerboard Width At 12th Fret: 2-1/8 Fingerboard Position Inlays: MOP Dots, Single at 5th, Double at 7th, Single at 9th, Double at 12th w/ MOP Square, Single at 15th & 17th Frets Fingerboard Binding: none Finish Back & Sides: Polished Gloss Finish Top: Polished Gloss w/ Vintage Toner Finish Neck: Satin Bridge Material: Solid Black Ebony Bridge Style: Belly Bridge String Spacing: 2-1/8 Saddle: 16” Radius/Compensated/White Tusq Tuning Machines: Gotoh Nickel Open-Geared w/ Butterbean Knobs Recommended Strings: Martin SP Lifespan Phosphor Bronze Light Gauge (MSP7100) Bridge & End Pins: White w/ Abalone Pearl Dots Pickguard: Tortoise Color – Beveled & Polished Case: 533EJM Geib style Interior Label: CFM IV & John Mayer Pre-Printed Signatures, Numbered in Sequence Electronics: Martin Gold Plus Natural 1