The Ernie Ball Earthwood 2051 Silk & Steel 12-String Soft Set are manufactured in the USA with precision and to the highest standards. With a gauge of 9-46 these Earthwood strings provide bright and balanced tones with crisp and pleasing highs. These popular acoustic guitar strings are ideal for guitarists who enjoy mellow tones produced by the silk. These 80/20 strings are precision wound from 80 copper and 20 zinc and they come as a 12 string set. The Earthwood Silk and Steel reduces finger noise and offers a comfortable playing experience. The Earthwood 80/20 strings are manufactured to ensure optimum performance and long life.