GHS CCBB20 (11-50) CC BRIGHT BRONZE The contact core design allows the core wire to have better contact with the bridge and soundboard, creating our brightest string. The end result is a richer and more defined bass tone with piano like clarity.Introducing our brand new Nitro-Pack 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 Nitro-Pack 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.CCBB20 Set: 011-014-CCBB20-CCBB30-CCBB38-CCBB50