Helicore violin strings are a favorite with advancing students and professionals alike! Made from stranded steel, Helicores combine the strength and direct purity and brilliance of steel with the soft feel and warmer tone of a rope core. Very durable and long lasting, and totally dependable for the most demanding conditions. Winding materials in aluminum (A), titanium (D) and silver (G). Solid E string with removable ball. Manufactured in a medium gauge for all styles of playing.