D'Addario Helicore Octave Series Violin D String 4/4 Size, Medium

D'Addario's Helicore Octave Violin Strings are designed to be played one octave below traditional violin tuning, which allows for new tonal and stylistic possibilities. These strings utilize the same core technologies as the Helicore violin strings. These strings are considerably thicker than traditional violin strings, and as a result, they require extra care to ensure proper installation.