These flat wound strings provide the smoothest feel and warmest tone, while allowing movement across the fretboard with no finger noise. Made with a high carbon steel core, Chromes’ stainless steel flattened ribbon wire is expertly wound onto a series of interlocking under-windings, then precisely polished for unparalleled smoothness and a sound which blends beautifully into any mix. 11-50 Jazz Light D'Addarios best selling gauge of flat wound strings, delivering the optimal tension for traditional jazz playing.