Boomer 12 String Light Electric Guitar Set (10-46). Known as "The Power String", GHS Boomers continue to make their mark on music across the world. The roundwound guitar set is made with nickel-plated steel wrapped tightly around a round core wire. The combination provides the string with its bright characteristic and long-lasting tone. Gauges: 10-46 1). 10, 10 2). 13, 13 3). 17, 09 4). 26, 11 5). 36, 17 6). 46, 26