The top choice of modern-style flamenco players, Flamenco 2001 Hard Tension strings are designed for today's remarkable guitars and the exceptional technique of contemporary concert performers. Most heavier designed sets produce a dull and thuddy sound. These hard tension strings are the exception and create a bright and forceful tone with a true flamenco attack. This special construction keeps the traditional string gauges and outlasts every other high tension string on the market.The 2001 Series® Flamenco Guitar Strings are the first choice of professional flamenco guitarists in Spain and throughout the world. In a class by themselves, these sets were developed in cooperation with leading flamenco guitarists. All set designs were tested and refined for more than two years- in recitals, recording studios and tablad performances.- Flamenca Negra treble strings possess a greater power, brilliance and a longer string life than any other string design on the market- Silver-Plated wound basses produce exceptional memory for pitch and consistent sound production- Hard Tension- String Gauges: Black Nylon Trebles: .029 .032 .040; Silver-Plated Wound Basses: .029 .0365 .0445- Made in the USA with American Wire- Packaged using MAP Technology (Modified Atmosphere Packaging) to prevent tarnishing and ensure freshness