Here is a Ko'olau S-1 model soprano is curly Hawaiian Koa. This instrument is unique in that it has friction tuners, which is a bit unusual for a Ko'olau. This ukulele has an all curly koa construction. Mahogany neck. Ebony bridge, fingerboard, and faceplate. M.O.P. logo and position markers. Hard shell Ko'olau case included. This is a great soprano. Ko'olau is refined again for this year, so be sure to check out all of the new models at Ukulele Puapua. Mahalo!