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 / Hard tension, a popular choice for its rich tone, increased resistance and strong projection / Made in the U.S.A. for the highest quality and performance / String Gauges: Trebles .0285, .0327, .0410 Basses .030, .036, .044 / Environmentally friendly, corrosion resistant packaging for strings that are always fresh