Aircraft cables and small diameter wire ropes usually consist of several strands of small individual wires that are bundled together. Those strands are then bundled together in an overlapping fashion to make the finished lengths of mechanical cable. A common construction for wire rope is the 7x19 style, or 7 bundles of 19 individual wires that are stranded together. This is a readily available construction that is popular because it is strong and quite flexible. This makes the wire rope easy to work with.