This set contains: E-Steel/Alumimum, Ball End, A-Stranded Steel/Silver, D-Stranded Steel/Tungsten-Silver, G-Stranded Steel/Tungsten-Silver. D'Addario Helicore Octave strings have a multi-stranded steel core, which results in optimal playability and a clear, warm tone. 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 utilises the same core technologies as the original Helicore violin set.

Features:

• 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 utilises the same core technologies as the original Helicore violin set.
• This set is considerably thicker than traditional violin strings. As a result, they require extra care to ensure they are properly installed on your violin. Please follow these guidelines for installation: Check that the grooves in your bridge and nut have room to accommodate the diameter of the octave strings. Excessive pressure or pinching may prevent normal movement. For best results, thoroughly apply graphite (pencil lead) to grooves before installing each string.
• Multi-stranded steel core.
• Optimal playability whilst producing a clear, warm tone. 
• Versatile string that works well for a wide variety of playing styles and instruments. 
• Suitable for beginner and intermediate students. 
• Small string diameter provides quick bow response. 
• Excellent pitch stability and longevity.
• Packaged in uniquely-designed sealed pouches providing unparalleled protection from the elements that cause corrosion.