EPN115's combine the playability of D'Addario's popular medium gauge set with a warmer, vintage tone. D'Addario XL Pure Nickel strings look back to the '50s, when nickel was the primary alloy found in electric guitar strings. Pure Nickel brings back the richer, warmer timbres found in traditional blues, classic rock, rockabilly, and more. • MFSKU EPN115 • UPC 019954954079