La Bella 2001 Series Classical Guitar Strings Hard Tension Nylon 202 trebles produce greater aural transparency and sound projectionSilver-plated wound basses produce exceptional memory for pitch and consistent sound productionHard tensionString Gauges: Clear Nylon Trebles .030 .0335 .041. Silver-Plated Wound Basses .029 .0365 .044.Made in the USA with American WirePackaged using MAP Technology (Modified Atmosphere Packaging) to prevent tarnishing and ensure freshness These high tension strings provide a superior strength and clarity of sound, a requirement for performing modern technique on todays concert guitars The 2001 Series Classical Guitar Strings are the product of years of intense research and development During the formulation of the 2001 Series, prototypes were tested worldwide by fine performing artists and teachers These guitarists expressed a need for classical guitar strings with a greater response, clarity and sustaining power