Ernie Ball strings are carefully crafted using the highest quality materials to ensure superior tone and reliability. The specially tempered high carbon steel core wire's hexagonal shape ensures the wrap wire is securely held in place through the length of the string. Precision crafted Swiss brass ball ends are attached with a triple lock twist. Made from 92% copper, 7.7% tin, 0.3% phosphorus wire wrapped around tin plated hex shaped steel core wire. These guitar strings have a light orange, gold color and provide a mellow, ringing sound, with excellent clarity.Gauges: .012; .016; .024w; .032; .044; .054