Ernie Ball strings are made from the finest materials so you get quality and consistency in every set.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.FeaturesString Gauges: .012, .016, .024p, .032, .044, .056Manufacturer Number: 2626