Thomastik Infeld Vienna SUPERFLEXIBLE Violin String Set 4/4 - 32.5 cm (#9 E)Superflexible strings with a braided steel core. Braided steel core strings for universal use. This string is an advance over conventional solid strings, lying midway in the path of evolution from the solid core to the advanced spiral core type. The solid core has been replaced by a cable type structure made up of braided steel threads. This reduces the string's stiffness, improving its elasticity. Superflexible is incomparably responsive and its tone