The 10MT Classical 10-String Modern Tuning Set has clear high-density nylon trebles and silver-plated wound basses for the first six strings. The extra low strings are specially designed for modern concert guitars with additional basses.- Clear nylon trebles produced greater aural transparency and sound projection- Silver-Plated wound basses produce exceptional memory for pitch and consistent sound production- String Gauges: Clear Nylon Trebles: .029 .0335 .041; Silver-Plated Wound Basses: .029 .036 .042, .052, .035, .040, .042- Made in the USA with American Wire- Packaged using MAP Technology (Modified Atmosphere Packaging) to prevent tarnishing and ensure freshness