Heavy GHS GBH Coated Boomers Electric Guitar Strings are made with roundwound nickel-plated steel. Designed for heavy metal, rock, country, blues, and pop styles, Dynamite Alloy Boomers help you achieve a bright, long-lasting tone. A set of heavy GBH Coated Boomers guitar strings have a gauge range from 12 to 52. GHS String Design GHS has made high-quality replacement strings since 1964 and GHS Boomers are their most popular electric guitar strings. The string specialists at GHS bring a craftsman-like approach to each aspect of guitar string design. From material selection to such intricate factors as core-to-cover ratio, winding direction, wire tension and alteration of the wire, GHS designs state-of-the-art strings that enhance the sound quality of all playing styles and instruments.Clear, thin coat on each string for protection against breakage Roundwound Nickel-plated steel Gauges: 12, 16, 19, 28, 38, 52