Elixir .013-.056 NW Acoustic. Elixir Acoustic 80/20 Bronze Strings with NANOWEB Coating deliver a bright, lively tone together with extended tone life that players have come to expect from Elixir Strings. Coated Strings just last longer. Anbd as one player puts it, "tone to the bone!" • MFSKU 11102 • UPC 733132111022