String set for the Indian Santoor. Pre-Looped coils of Natraj brand steel strings: 15 strings of .015 steel, 15 strings of .011 steel, 10 strings of .013 steel, and 15 strings of .008 steel, and 18 strings of .018 steel. 6 strings each of Karuna brand #3 and #4 guitar copper wound wire with pre-looped ends.