Let D'Addario's pure nickel guitar strings bring a classic, warm vintage sound to your electric guitar playing. This was the traditional blues, rockabilly and classic rock sound of the 1950s, brought into the present day in these exceptionally-designed strings. D'Addario strings are a family tradition that dates back to the late 1600s in Italy. Today, they are widely recognized as one of the largest string manufacturers in the world, and are highly regarded among professional musicians of all genres and styles. Their EPN 110 strings are a light gauge set, with the top 3 strings made from plain steel ranging from .010 to .017 gauges. The bottom 3 strings are nickel wound with .025 to .045 gauges. This is their best-selling set of pure nickel strings. The EPN 115s are a medium gauge, for blues and jazz rock, while the EPN 120s, from .009 to .041, are a super light gauge. The EPN 21 and EPN 22 Jazz Light and Medium gauge also feature pure nickel round-wound strings for a clear, bright tone. See the rave reviews from our customers. All strings come in corrosion-resistant packaging and are proudly manufactured in the U.S. to high performance quality standards.