Buy 3 sets and save with this environmentally friendly, corrosion resistant 3-pack / D'Addario's best selling Pro Arte set, Normal tension offers a balance of volume and comfortable resistance / Laser sorted clear nylon treble strings for consistent, precise intonation / Precision wound basses for warm, projecting tone and the utmost consistency / String Gauges: Trebles .0280, .0322, .0403 Basses .029, .035, .043 /