I just took some great strings off my great broken bass and put them on my "plywood" bass. I honestly don't have a clue what kind they are. They are like steel but softer to the touch and easier in to press in the upper register. It picks up increadible vibrato. If i barely move my finger you can tell the differance. They dont seem as loud b/c of the lower tention but it is. I can't realy think of anything else to tell yall. I don't realy know mutch about strings what kind so can any one make a educated guess about what type they could be?