Sized to fit long-scale viola (body length 16-16 1/2 inches) with a playing length of 15 inches (380mm), these light tension strings allow for easier bow response. This is a plain steel E (tin-plated high-carbon steel). 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.