D'Addario EJ67 Nickel Mandolin Strings EJ67 mandolin strings, great for electric or acoustic mandolin playing Loop end construction for universal fit Round wound with nickel-plated 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 EJ67 mandolin strings, great for electric or acoustic mandolin playing^Loop end construction for universal fit^Round wound with nickel-plated 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