Martin Guitars 0XK Concert Uke Koa - Concert ukulele with a top, back, and sides made of high-pressure laminate (HPL), laminated neck made of brown birch, white dot inlays, 17 frets, scale length of 381 mm, Tusq nut, nickel-plated tuning machines, nut width of 35.7 mm, Martin Guitars M600 ukulele strings, Koa colour, and included carrying bag.