Point(1) = {1., 0.28, 0., 0.4};
Point(2) = {2., 0.28, 0., 0.4};
Point(3) = {2., 1., 0., 0.4};
Point(4) = {1., 1., 0., 0.4};
Line(1) = {1, 2};
Line(2) = {2, 3};
Line(3) = {3, 4};
Line(4) = {4, 1};
Line Loop(1) = {1,2,3,4};
Plane Surface(1) = {1};
//
Transfinite Line {1} = 26 Using Progression 1.;
Transfinite Line {2} = 21 Using Progression 1.;
Transfinite Line {3} = 26 Using Progression 1.;
Transfinite Line {4} = 21 Using Progression 1.;
//
Transfinite Surface {1};
Recombine Surface {1};
//
Extrude {{1, 0, 0}, {0, 0, 0}, Pi} {
  Surface{1};Layers{24};Recombine;
}
//
Extrude {{1, 0, 0}, {0, 0, 0}, Pi} {
  Surface{26};Layers{24};Recombine;
}
