Medium-scale viola (body length 15-15 3/4 inches) with a playing length of 14 1/8 inches (360mm). Medium tension. Solid and stranded steel cores provide warmth, projection and allow for extreme bow weight. Versatile string that works well for a wide variety of playing styles and instruments. All D'Addario strings are designed, engineered and manufactured in the USA to the most stringent quality controls in the industry. .