supply of srph153060-aortic stent graft: - should enable endovascular treatment of a rch of aorta and descending thoracic aorta aneurysms and dissections. the stent gr aft should come in various lengths and diameters. it should consist of ( 1 ) a self expan ding, tubular endoprosthesis composed of a polyester graft fabric and a spring scaf fold made from nitinol wire. ( 2 ) radiopaque markers are to be sewn to the fabric to ra diographically visualize the edge of the graft material to provide a guide to the minim um overlap distance required. ( 3 ) a pre- loaded delivery system. ( 4 ) aortic occlusion ba lloon to assess the aneurysm / dissection with angiography ( 5 ) marker pigtail to asses s in proper sizing and deployment. unit: no