// All dimensions are assumed to be given in millimeters

major_width = 7;
// major_height = 1;
major_height = 8;

minor_width = 5;
minor_height = 4;

for (i=[0:0]) {
    union() {
        translate(v=[10*i, 0, minor_height / 2]) {
            cube([minor_width, minor_width, minor_height], center=true);
        }

        translate(v=[10*i, 0, - major_height / 2]) {
            cube([major_width, major_width, major_height], center=true);
        }
    }
}