D'Addario Pro-Arte Classical guitar strings are preferred by players and guitar makers for their excellent tone, precision, and consistency. Each Pro Arte treble string is measured 200 times by a sophisticated, computer-controlled laser system that performs consistency and quality control cheques while determining the string's exact playing tension. These attributes ensure a great quality set of strings every time.D'addario J49 Classical guitar strings feature the same quality and precision as clear Pro Arte strings but offer black treble strings. This provides a more traditional look that any musician can appreciate.

• D'Addario's best selling Pro Arte set, Normal tension offers balance of volume and comfortable resistance
• Laser sorted black nylon treble strings for consistent, precise intonation
• Precision wound basses for warm, projecting tone and the utmost consistency
• Made in the U.S.A. for the highest quality and performance
• String Gauges: Trebles .0280, .0322, .0403 Basses .029, .35, .043