D'Addario EJ26 .011- .052 Phosphor Bronze Acoustic Strings . One of our best selling sets of strings. D'Addario are particularily fussy when it comes to inspecting and buying the raw materials that they use in the manufacturer of their strings. They get frustrated when their strings are faked and returned to them as an inferior product. We buy our strings direct from D'Addario. No fakes here!!