D'Addario EJ26 Phosphor Bronze 11-52 Custom Light Acoustic Guitar Strings Referred 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. Phosphor Bronze was introduced to string making by D'Addario in 1974 and has become synonymous with warm, bright, and well balanced acoustic tone. String Gauges: Plain Steel .011, .015, Phosphor Bronze Wound .022, .032, .042, .052