Product details:

StewMac Tonewoods - Slotted Fingerboard for Martin Guitar, Ziricote 25 34 scale and bull 16 radius and bull 20 slots - Slotted for Martin Dreadnought guitars this is the most common acoustic scale length Note Martin Dreadnought scale is commonly referred to as 25 4 but is actually 25 34 Our kiln-dried fingerboards have flat undersides are unfretted no inlays and ready for trimming to fit a variety of neck widths Approximate dimensions 2-1 2 x 18-3 4 x 15 64 63 50mm x 476 25mm x 5 95mm - Scale 25 34 643 64mm - Radius 16 406 40mm