ChromaCast CC-GS-CB-L Classic Bronze Light Acoustic Guitar Strings.011-.052 Long lasting, Classic Bronze strings These strings give you great response, clarity, bright trebles and deep, rich bass tones Made of 85% Copper and 15% Zinc Sealed, corrosion resistant packaging prolongs string life. Made in the U.S.A. Light gauge: .011, .015, .024, .032, .042, .052