GHS L5200 (40-100) CONTACT CORE GHS Contact Core are designed with an extra-thin segment near the ball end. This thin segment rests on the bass saddles and brings the central core of the string into very close contact with the saddle, providing a brighter tone than a conventional string of the same gauge. When tuned to pitch these strigns have slightly more tension than conventional strings, a crucial feature for the low B string in a 5 or 6 string set.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.L5200 Set: STB40-CC60-CC80-CC100