| Delivers a full tonal spectrum, revealing the unique tonal qualities of your acoustic guitar Increased corrosion resistance for a longer lasting uncoated string Feature D’Addario’s exclusive high-carbon NY steel for unprecedented strength and tuning stability | Environmentally-friendly, corrosion-resistant packaging keeps strings fresh Made in the U.S.A. for the highest quality and performance String Gauges: Plain Steel .010, .014, Nickel Bronze Wound .023, .030, .039, .047 |