Sized to fit long-scale viola (body length 16-16 1/2 inches) with a playing length of 15 inches (380mm), medium tension strings are optimized to the needs of a majority of players. This D string is silver wound. Packaged in uniquely-designed sealed pouches providing unparalleled protection from the elements that cause corrosion. Pro-Arte synthetic core viola strings have a warm, mellow tone. They are less sensitive to humidity and temperature changes, and break in quickly. Pro-Arte strings are manufactured at a lower tension in order to maximize bow response, tonal blend and playability. The perfect choice for players seeking a warm, dark tone.