EJ67 mandolin strings, great for electric or acoustic mandolin playing / Loopend construction for universal fit / Round wound with nickelplated steel for distinctive bright tone / Made in the U.S.A. for the highest quality and performance / String Gauges: Plain Steel .011/.011, 014/.014, Nickel Wound .025/.025, .039/.039 / Environmentally friendly, corrosion resistant packaging for strings that are always fresh