This concert ukulele has a solid koa top. The sides and back are also made of this material, which gives this instrument a unique sound. The neck is mahogany. Bridge and fingerboard are made of engineered wood. Equipped with closed geared tuners and strung with Aquila strings. The strings are fixed on the bridge with a pin. We see this system on a daily basis with guitars with metal strings, but with ukuleles this is certainly not common. But this isn't an everyday ukulele either. The sound box is beautifully finished with a binding and decorated with a "Mother of Pearl" inlay.