Light tension version of the best selling Pro Arte series / Laser sorted clear nylon treble strings for consistent, precise intonation / Precision wound basses for warm, projecting tone and the utmost consistency / Made in the U.S.A. for the highest quality and performance / String Gauges: Trebles .0275, .0317, .0397 Basses .028, .033, .042 / Environmentally friendly, corrosion resistant packaging for strings that are always fresh