Medium strings for 12 string guitar. VintageBronze gives you clarity, tone, and response like no other string. Add a great feel and long life, and there's not much more you could ask for. Made of 85% Copper and 15% Zinc, this true bronze string has been delivering satisfaction to the most demanding acoustic players since its very beginning in 1972. Features set of twelve strings. String size: .012 - .012 / .016 - .016 / .026 - .010 / .034 - .017 / .044 - .024p / .054 - .030.