// Gmsh project created on Sat Dec 15 10:36:13 2018
//+
SetFactory("OpenCASCADE");
Box(1) = {-37.5, 0, -18, 150, 40, 45};
//+
Physical Volume(1) = {1};
//+
Dilate {{0, 0, 0}, {0.001, 0.001, 0.001}} {
  Volume{1}; 
}
//+
Physical Surface(2) = {1};
//+
Physical Surface(3) = {2};
//+
Physical Surface(4) = {4, 5, 6, 3};
//+
Characteristic Length {1, 2, 6, 5} = 0.004;
//+
Characteristic Length {3, 4, 8, 7} = 0.006;
//+
Recombine Surface {4, 5, 2, 1, 6, 3};
//+
Recombine Surface {5};
//+
Recombine Surface {5};
//+
Recombine Surface {1};
//+
Recombine Surface {1};
