From the ManufacturerReferred to as Custom Light, EJ26 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. Buy 3 sets and save!Phosphor Bronze was introduced to string making by D"Addario in 1974 and has become synonymous with warm, bright, and well balanced acoustic tone. D"Addario Phosphor Bronze strings are precision wound with corrosion resistant phosphor bronze onto a carefully drawn, hexagonally shaped, high carbon steel core. The result is long lasting, bright sounding tone with excellent intonation.D"Addario, the world"s largest manufacturer of musical instrument strings, is known as The Players Choice with a reputation for unsurpassed quality and consistency. D"Addario"s innovative, packaging reduces waste and provides protection from corrosion. All D"Addario strings are manufactured in the U.S.A. using proprietary, digitally controlled, state-of-the-art machinery for unmatched performance, set after set.Product DescriptionEJ26 Custom Light 11-52. D"Addario Phosphor Bronze Acoustic Guitar strings are acclaimed worldwide for their superb long-lasting tone. Phosphor Bronze was introduced to string making by D"Addario in 1974 and has bee synonymous with warm bright and well balanced acoustic tone. D"Addario"s most popular acoustic guitar strings.