Point(1) = {0,0,0,1};
Point(2) = {0,2e-2,0,1};
Point(3) = {0,2e-2,0.4e-2,1};
Point(4) = {0,0,0.4e-2,1};
Line(1) = {1,4};
Line(2) = {4,3};
Line(3) = {3,2};
Line(4) = {2,1};
Line Loop(5) = {3,4,1,2};
Plane Surface(6) = {5};
Extrude Surface {6, {0.1e-2,0,0}};
Surface Loop(29) = {28,15,6,19,23,27};
Volume(30) = {29};

