D'Addario Helicore Viola String Set, Medium Scale, Medium TensionSized to fit medium scale viola (body length 15 15 3 4 inches) with a playing length of 14 1 8 inches (360mm), these medium tension strings are optimized to the needs of a majority of players. 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