4/4 SCALE VIOLIN WITH A PLAYING LENGTH OF 13 INCHES (328MM). MEDIUM TENSION. MEDIUM TENSION. KAPLAN VIVO DELIVERS BRILLIANCE, CLARITY, AND A ROBUST FEEL FOR DARKER 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