Extra light 12 string set for acoustic guitar from SP series that is designed with the performer in mind – it provides an excellent tone, clarity, and response. Strings are made from high-tensile strength steel core with 80/20 bronze winding which provides a warmer sound than 92/8 phosphor bronze and is suited for strings that have deep, rich basses and bright trebles. This set ensures a maximum string life and a clear, rich, and exciting tone. Gauges: .010/.010, .014/.014, .023/.010, .030/.012, .039/.018, .047/.027.