Kaplan violin strings offer professional-level players an unprecedented combination of beauty and power in two options, Kaplan Amo and Kaplan Vivo. Kaplan Amo provides warmth, richness, and flexibility for brighter instruments, while Kaplan Vivo delivers brilliance, clarity, and a robust feel for darker instruments. Both sets settle quickly, exhibiting a rich tonal color palette and superb bow response.Scaled to fit 4/4 size violin with a playing length of 13 inches (328mm), these medium tension strings are optimized to the needs of a majority of players. Packaging in uniquely-designed sealed pouches provides unparalleled protection from the elements that cause corrosion.•  4/4 scale violin with a playing length of 13 inches (328mm)•  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