ELIXIR ATTUNE 21027 Phosphore Bronze Custom Light 11-52Introducing Elixir Attune Strings a breakthrough in tone and feel that gives your guitar a voice you've never heard before. Nith its natural touch and crisp, longest lasting tone, Attune rings out the sound that keeps you playing for hours. Only coated string brand to protect the entire string with an ultra thin coating, keeping gunk out of the gaps between the windings Longest lasting tone of any string today players report their tone lasts longer