Custom Light strings for acoustic guitar. The Hyper-Elliptical compressed winding process allows for an increased number of wraps across the length of the string without altering its diameter, resulting in fuller tone, incredible sustain, amazing output, and an increased life span. Made of 92% Copper and 8% Zinc. Features set of six strings. String size: . 012 / .016 / .025 / .032 / .042 / .053.