Referred to as Custom Light, EJ13 strings are a D'Addario original hybrid gauge and a comfortable compromise for players who want the depth and projection of light gauge bottom strings, but slightly less tension on the high strings for easy bending. Extra-bright tone mixed with deep and projecting bottom end. Environmentally friendly, corrosion resistant packaging for strings that are always fresh. Made in the U.S.A. for the highest quality and performance. String Gauges: Plain Steel 0.011, 0.015, Bronze Wound 0.022, 0.032, 0.042, 0.052.