The Gold Tone FGS12EX Extra Light 12-string mando-guitar strings are designed for use with the F-12 mando-guitar to produce a warm, shimmering tone. You'll enjoy the crisp, ringing quality of the bronze-wound strings and the clarity of the plain steel strings. Environmentally-friendly, corrosion-resistant packaging keeps the strings fresh until you're ready to install them. Made in the USA, these custom-gauge strings are built to the highest quality standards.