Thomastik-Infeld JS113 Jazz Swing Flatwound Electric Guitar Strings - .013-.053 MediumThis is the legendary flatwound jazz guitar string! A list of its players reads lika a Jazz Hall of Fame and it's still the undisputed king of flatwounds, for many of today's jazz greats. A true flatwound (not a "ground wound" or "compressed wound" like some of the pretenders) with glassy smooth polished nickel winding on a round core, it has the perfect balance of fundamental to overtones required for traditional jazz. Some players claim that its