Heavy 6 string set for electric guitar from ROTO series, developed in collaboration with world’s top artists. Strings are made of steel core and nickel winding – the ratio between core and cover is Rotosound secret, and with special emphasis on ball end strength. They deliver extraordinary sustain, powerful tone, tonal nuances and incredibly long lifespan. All Rotosound strings are manufactured in England. Gauges: .013, .017, .026w, .034w, .044w, .54w.