Rotosound CL4 Black & Silver Classical Guitar Strings, Normal Tension

Grade 1 Black n' Silver' classical guitar strings are manufactured to a normal-tension characteristic specifically designed for finger style playing. The wound strings are silver-plated copper on a nylon core and the plain strings are high-quality rectified black nylon. Tie on. Rotosound Black n Silver Tie-On Normal Tension Classical Guitar Strings

Trebles: high quality rectified black nylon
Basses: silver-plated copper over nylon