A system and components for treating aortic aneurysms includes a reinforcing graft and fittings for securing the graft to a host vessel and to branch vessels, for example the iliac and renal arteries. The double gated MOSFET features narrow channels, which increases current drive per layout width and provides low out conductance. When installed, the block insures that the piping is positioned immediately adjacent the back surface of the interior sheathing material.