Prim Violin strings Electric Violin - D Medium (1313)the famous quality strings from Sweden new series especially for electric violins (but can also be used on classical violins) fast response and good balance available as a 4 string and 5 string set as well as single strings in medium additional single strings to extend for 6 and 7 string electric violins special single string Bb medium extra long for instruments with string lengths over 395 mm (ball end to nut) E string: steel string, tin plated 0.