D'Addario Helicore Octave Violin String Set, 4/4 Scale, Medium TensionScaled to fit 4 4 size violin with a playing length of 13 inches (328mm), these medium tension strings are optimized to the needs of a majority of players. The Helicore Octave Violin Set is designed to be played one octave below traditional violin tuning for a new world of tonal and stylistic possibilities. It utilizes the same core technologies as the original Helicore violin set. This set is considerably thicker than traditional violin strings. As a