Based in Italy, Dogal has been making fine quality guitar strings since the 1960s. The innovative Diamante strings feature carbon fiber in addition to the traditional nylon, and the basses add kevlar and carbon fiber to the traditional nylon in the multi-strand core. This results in a string that is bright, durable, sustaining, harmonically rich, with a well-defined foundation and an excellent stability of tuning. Try these wonderful Dogal Classical Guitar Strings today!Specification String (Note)Diameter (In)Tension (lbs)Material1st (E)0.028514.55Nylon Carbon Mix2nd (B)0.03310.58Nylon Carbon Mix3rd (G)0.040510.58Nylon Carbon Mix4th (D)0.02914.33Multi-Strand Nylon Carbon Mix5th (A)0.03413.67Multi-Strand Nylon Carbon Mix6th (E)0.04313.67Multi-Strand Nylon Carbon Mix