GHS offers mandolin strings in a wide variety of winding materials to accommodate all playing styles. Our phosphor bronze sets feature increased brightness with a longer tone life. 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 STRINGS. GHS 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.