Custom gauge 6 string set for acoustic guitar from that delivers natural feel with warm, tone and excellent projection. Strings are made from 92% copper, 7.7% tin and 0.3% phosphorus wire wrapped around hex-shaped tin-plated steel core wire. They have a light orange-golden colour and provide mellow, ringing sound. Strings are precisely manufactured to the highest standards and most exacting specifications to ensure consistency, long life and optimum performance. Gauges: .010, .014, .020w, .028, .040, .050.