Sized to fit 4/4 scale violin with a playing length of 13 inches (328mm), these medium tension strings are optimized to the needs of a majority of players. This is an aluminum wound steel-core E string. Pro-Arte synthetic core violin strings have a warm, mellow tone. They are less sensitive to humidity and temperature changes, and break in quickly. Pro-Arte strings are manufactured at a lower tension in order to maximize bow response, tonal blend and playability. The perfect choice for players seeking a warm, dark tone.