D'Addario H3104-4 Helicore Violin String Set 4/4 MediumScaled 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. The E string included with the H310 set is a plain steel E (tin plated high carbon steel) with no winding. Packaged in uniquely designed sealed pouches providing unparalleled protection from the elements that cause corrosion. Helicore violin strings are crafted with a multi stranded steel core,