GHS VINTAGE BRONZE - STRING SET FOR ACOUSTIC GUITAR Gauge: 012/016/024/032/042/054 Type: Roundwound Material: 85/15 Copper/Zinc GHS VINTAGE BRONZE: GHS's warmest sounding strings are created with the combination of core-to cover ratio and copper/zinc wire, resulting in a warm and rich tone, perfect for those overly bright guitars that need to be reined in tonally. GHS Vintage Bronze acoustic guitar strings are wound with a special, time d 85/15 copper-zinc alloy over a hex core to provide a rich, warm yet vibrant tone. The redesigned core to cover ratio yields a richer blend with an extended tone. PLAY WITH THE BEST: GHS is one of the best-selling strings in the world. USA made according to the latest technology.