Designed for use with octave mandolins of various scales / Loopend construction for universal fit / Preferred for its warm, bright, and well balanced acoustic tone / Made in the U.S.A. for the highest quality and performance / String Gauges: Plain Steel .012/.012, Phosphor Bronze Wound .022/.022, .032/.032, .046/.046 / Environmentally friendly, corrosion resistant packaging for strings that are always fresh.