EJ31's are a hard tension classical guitar string set containing silver on nylon wound strings and rectified clear nylon treble strings for highly accurate intonation. D'Addario Pro-Arte Rectified sets utilise our precision rectified nylon trebles - each ground using our proprietary centerless grinding technique. Roundness and dimension control are unsurpassed, ensuring absolutely perfect intonation. Classics are known for their warmer, mellower tone and slightly textured feel.
All Pro-Arte treble strings are manufactured with our in-house extruded nylon, ensuring consistent strings with precise intonation. Pro-Arté basses are wound using silver-plated copper on a multi-filament nylon core for consistent and warm, yet projecting tone.