Check the listing for details. Helicore Violin String Set 4/4 Scale Medium Tension H310 4/4M D'Addario. Condition: New. Listed at 54.99 USD. D'ADDARIO HELICORE 4/4 SIZE VIOLIN STRINGS 4/4 SIZE SET WITH STEEL E STRING H310 4/4M 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. 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, resulting in optimal playability while producing a clear, warm tone. The smaller string diameter provides quick bow response. Premium quality materials combined with skilled workmanship produces strings known for excellent pitch stability and longevity.