Stiffer string wound on nylon, they offer consistant resistance under fingers for a fast response and an easy control. Brilliant and powerful sound. SPECIFICATIONS: Trebles Strings: E1 - B2 - G3 ALLIANCE Fluoro carbon thinner stringsoffers a clear sound all over the treblesstrings. Authorise infinity of nuances and coloursand remain clear on very high position. G3rd assumes a perfect transition from B2to A3. Basses Strings: D4 - A5 - E6 Wound on nylon. Stiffer and brilliant powerful sound. Large overtones spectrum. Offer consistant resistance underfingers for a fast response andan easy control.