A high quality core wire is wrapped with a round, pure nickel cover that is slightly flattened by computer controlled precision rollers in the winding process. The result is a semi-flat string that has a warm but articulate tone, which feels great under the fingers.ABOUT GHS STRINGSGHS Strings are manufactured in a state-of-the-art, climate controlled facility using precision equipment and only the purest of materials. When you buy GHS strings you get quality, consistency, lasting intonation and superbly harmonious sound! GHS Strings - The String Specialists since 1964.R+RXL Set: 009-011-016-N24-N32-N42