Musician's Gear Acoustic 12 80/20 Bronze Acoustic Guitar Strings Acoustic 12 80/20 Bronze Acoustic Guitar Strings Acoustic 12 80/20 Bronze guitar strings deliver a strong, deep bass response with extremely bright and crisp overtones They are made from an 80% copper and 20% zinc alloy, and are manufactured to the highest tolerance standards to enhance your musical enjoyment and performance Acoustic 12 80/20 Bronze guitar strings deliver a strong, deep bass response with extremely bright and crisp overtones They are made from an 80% copper and 20% zinc alloy, and are manufactured to the highest tolerance standards to enhance your musical enjoyment and performance