These are excellent classical guitar strings. Made in New Jersey (always noted for their contributions to classical music. Pro-Arte's 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 checks while determining the string's exact playing tension.

 

EJ45 - (red label) Normal Tension

EJ46 - (blue label) Hard Tension

EJ44 - (purple label) Extra Hard Tension