Scaled to fit 4/4 size violin with a playing length of 13 inches (328mm), medium tension strings are optimized to the needs of a majority of players. This is an aluminum-wound E string with loop end. Kaplan violin E strings provide the traditional rich sound expected from high-quality steel E strings. Multiple options available for a wide array of performance needs, including plain steel, aluminum wound, and gold plated. Also available is a unique non-whistling violin E string.