Silver plated copper wound on an exclusive Composite core material for powerful, long lasting tone / Composite 3rd/G for increased projection, clear nylon 1st and 2nd strings. All laser sorted for consistent, precise intonation / Normal tension offers popular balance of volume and comfortable resistance / Made in the U.S.A. for the highest quality and performance / String Gauges: Trebles .0280, .0322, .036 Basses .028, .35, .044 / Environmentally friendly, corrosion resistant packaging for strings that are always fresh