EJ49, normal tension, is D'Addario's bestselling classical set containing black nylon trebles, preferred for itsbalance of rich tone, comfortable feel and dynamic projection.

Pro-Arte, the world's most popularclassical strings are D'Addario's premium classical guitar string sets.All Pro-Arte treble strings are sorted by a sophisticatedcomputer-controlled laser machine which performs diameter and tensionmeasurements, ensuring true-sounding, precise trebles in every set.Pro-Arte basses are wound using silver-plated copper on amulti-filament nylon core for consistent and warm, yet projecting tone.