From 1964 to now, the GHS Boomers series has been the flagship set of GHS Strings. Used by musicians in every genre, the Boomers have shown to stand up to any playing style. Now 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.Introducing our brand new NitroPack singles! Each single string is sealed in a nitrogen environment, eliminating all oxygen, in a tear-resistant package. Whether you use one string or the whole set, the NitroPack guarantees straight from the factory freshness!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.GB7H Set: 013-017-DY30-DY42-DY54-DY64-DY74 Featuring Nitro-Pack singles, guaranteed to be fresh from the factory! 7-String Set featuring Roundwound Nickel-Plated Steel on a Hex Core Offers a brilliant tone and powerful attack, THE POWER STRING. Heavy Gauge: 013-017-030-042-054-064-074