D'Addario EJ51's feature polished basses for reduced finger noise, making them ideal for recording. These hard tension strings are a popular choice for their rich tone, increased resistance, and strong projection. 

Semi-Polished Strings
Semi-polished classical guitar strings feature a flattened wrap wire surface for maximum finger noise reduction, making them ideal for use with microphones on stage or in the recording studio.

• Feature polished basses for reduced finger noise - ideal for recording
• Laser sorted black nylon treble strings for consistent, precise intonation
• Hard tension, a popular choice for its rich tone, increased resistance and strong projection
• Made in the U.S.A. for the highest quality and performance
• String Gauges: Trebles .0285, .0327, .0410 Basses .030, .036, .044
• Environmentally friendly, corrosion resistant packaging for strings that are always fresh

Pro-Arte strings are our the world's best selling and D'Addario's premium classical guitar strings. All Pro-Arte treble strings are sorted by a sophisticated computer-controlled laser machine which performs diameter/tension measurements and quality check's, insuring true sounding, precise trebles in every set. EJ51 Pro-Arte Basses are made from silver-plated copper wound on Nylon which is polished semi flat. These polished basses reduce finger noise making them excellent for recording.