Abstract: An embolization device has a metal stent structure, and a plurality of fiber strands attached to the outer surface of the metal stent structure. An intermediate transition structure can also surround the metal stent structure, with the plurality of fiber strands is attached to an outer surface of the intermediate transition structure. In use, the embolization device is first delivered to the location of an aneurysm, and then a stent-graft is introduced into the lumen of the embolization device and expanded for deployment inside the lumen of the embolization device.