Rooted in generations of D’Addario string making expertise, Pro-Arte’ Black Nylon is our archetypal classical set. The bass strings are made with a multifilament nylon core and wound with silver-plated copper, for an exceptionally warm and consistent response. Coupled with black nylon treble strings, which deliver sweet, mellow highs, Pro-Arte’ Black Nylon gives you the sound and feel that has come to define classical guitar. This Hard tension set provides rich, bold tone and strong projection. Features: - •\tD'Addario's best selling Pro-Arté set, Normal tension offers balance of volume and comfortable resistance •\tLaser sorted black nylon treble strings for consistent, precise intonation •\tPrecision wound basses for warm, projecting tone and the utmost consistency •\tMade in the U.S.A. for the highest quality and performance •\tString Gauges: Trebles .0285, .0327, .0410 Basses .030, .036, .044 •\tEnvironmentally friendly, corrosion resistant packaging for strings that are always fresh