D'Addario Helicore Viola Single D String, Long Scale, Heavy Tension, H412-H

Material 1:
Stranded Steel Core/Titanium
String Total:
Single String
Heavy Tension
Scale Length:
Long Scale
End Type:
Ball End

D'Addario Helicore Viola Single D String, Long Scale, Heavy Tension

Sized to fit long-scale viola (body length 16-16 1/2 inches) with a playing length of 15 inches (380mm), these heavy tension strings will allow for greater projection and volume potential. Packaged in uniquely designed sealed pouches providing unparalleled protection from the elements that cause corrosion.


Helicore viola strings are crafted with a multi-stranded steel core, resulting in optimal playability while producing a clear, warm tone. The smaller string diameter provides quick bow response. Premium quality materials combined with skilled workmanship produces strings known for excellent pitch stability and longevity.

DEFINED TONE: clear and focused articulation


 INCREDIBLE BOW RESPONSE: fast, flexible, and responsive

UNPARALLELED VERSATILITY: pairs exceptionally well with a wide variety of instrument types and musical styles






2nd D

Titanium Wound





"Helicore strings are crafted with a multi-strand twisted steel core and wound with exotic metals like titanium (used here for the first time in bowed instrument strings). These innovative materials have enabled us to design strings with a very small diameter to provided extremely quick bow response. The application of damping resins under selected windings gives the Helicores a warm, rich sound, quite unlike steel strings of the past. The strings are subtle under the ear, yet carry great projection in large concert halls. Helicores stay in tune especially well due to their cores, and retain a very long playing life. They are available in complete sets or individually for violin, viola, cello and bass."