D'Addario's best selling Pro-Arté set, Normal tension offers balance of volume and comfortable resistanceLaser sorted clear nylon treble strings for consistent, precise intonationPrecision wound basses for warm, projecting tone and the utmost consistencyMade in the U.S.A. for the highest quality and performanceString Gauges: Trebles .0280, .0322, .0403 Basses .029, .35, .043Environmentally friendly, corrosion resistant packaging for strings that are always fresh Pro-Arte, the world's most popular classical strings are D'Addario's premium classical guitar string sets. All Pro-Arte treble strings are sorted by a sophisticated computer-controlled laser machine which performs diameter and tension measurements, ensuring true-sounding, precise trebles in every set. Pro-Arte basses are wound using silver-plated copper on a multi-filament nylon core for consistent and warm, yet projecting tone.Instrument	4/4 Size Classical GuitarTension	85.85 lbs - Regular TensionTrebles	Clear NylonBasses	Silver Plated CopperGauges	28, 32.2, 40.3, 29, 35, 43Tie-On / Ball End	Tie-onConstruction	RoundwoundCoated / Non-Coated	Non-Coated EJ45, normal tension, is D'Addario's best selling classical set, preferred for its balance of rich tone, comfortable feel and dynamic.