Medium-scale viola (body length 15-15 3/4 inches) with a playing length of 14 1/8 inches (360mm). Medium tension. Kaplan Amo delivers warmth, richness, and flexibility for brighter instruments. Synthetic core produces a rich, powerful tone. Short break-in time and excellent bow response provides superb playability. All D'Addario strings are designed, engineered and manufactured in the USA to the most stringent quality controls in the industry.