J64's are designed specifically for the 4-string dulcimer and its unique picking and stemming styles. D'Addario offers a wide variety of ethnic instrument strings designed to the exacting specifications of our artists, instrument parterns and international customers. Our computer-controlled winding machinery, laser micrometer inspection, and closed-loop tension control systems promise unrivaled quality and consistency, set after set.FeaturesDesigned specifically for the 4-string dulcimerContains 3 plain steel strings and one nickelplated steel wound on steel stringDistinctive bright tone and excellent intonationEnvironmentally friendly, corrosion resistant packaging for strings that are always freshMade in the U.S.A. for the highest quality and performance.