D'Addario's coated EXP strings are equipped with the plain steels and hexagonal cores of the revolutionary NY strings. These newly developed carbon steel wires offer tremendous tensile strength and tuning stability. Combined with high-quality winding materials, precision wound, and ultra-thin coated, they provide a sound similar to uncoated strings while lasting up to four times longer. They have significantly higher durability than standard strings. Gauge: .011 .014 .018 .028 .038 .049.