| A D'Addario hybrid gauge, combining medium bottom strings with light top strings. Big sound with comfortable playability 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 .012, .016, Phosphor Bronze Wound .025, .035, .045, .056 |