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. All D'Addario strings are designed, engineered and manufactured in the USA to the most stringent quality controls in the industry. Available strings D'Addario Pro-Arte Violin String Set, 1/16 Scale, Medium Tension J56 1/16M D'Addario Pro-Arte Violin String Set, 1/2 Scale, Medium Tension J56 1/2M D'Addario Pro-Arte Violin String Set, 1/4 Scale, Medium Tension J56 1/4M D'Addario Pro-Arte Violin String Set, 1/8 Scale, Medium Tension J56 1/8M D'Addario Pro-Arte Violin String Set, 3/4 Scale, Medium Tension J56 3/4M  D'Addario Pro-Arte Violin String Set, 4/4 Scale, Medium Tension J56 4/4M