GHS 4RMB (45-105) TAPER CORE A hybrid of stainless steel and nickel-iron wraps, this string has a tight attack with a warm tone. The slightly larger core wire allows the string to remain at a suitable tension when down tuned.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 1964.4-RMB Set: RMB45-RMB65-RMB85-RMB105