| EXP coated Phosphor Bronze, 6-string Resophonic Guitar Strings EXP Coated phosphor bronze for warm, bright, well balanced acoustic tone and 4 times more life Feature D’Addario’s exclusive New York manufactured, high carbon steel for unprecedented strength and pitch stability. | Environmentally friendly, corrosion resistant packaging for strings that are always fresh String Gauges: Plain Steel .016, .018, Phosphor Bronze Wound .028, .035, .045, .056 |