wall = 1;

box_width = 190;
box_depth = 115;
box_height = 55;
box_height_offset = -5;

bar_width = 15;
bar_depth = 95;
bar_height = 9;
bar_distance = 125;
bar_offset = (box_width - bar_distance - 2 * bar_width) / 2 + (bar_width / 2);

/*
translate([0, 30, -box_height_offset]) {
difference() {
    union() {
        translate([bar_offset, 0, 0])
            cube([bar_width, bar_depth, bar_height]);

        translate([bar_offset + bar_distance, 0, 0])
            cube([bar_width, bar_depth, bar_height]);
    }

    translate([0, bar_depth - 85, -1])
        cube([box_width, 10, 4]);

    translate([0, bar_depth - 20, -1])
        cube([box_width, 10, 4]);
}

translate([bar_offset - 4 * wall, 0, bar_height])
    cube([bar_width + 4 * wall, bar_depth, wall]);

translate([bar_offset + bar_distance, 0, bar_height])
    cube([bar_width + 4 * wall, bar_depth, wall]);

translate([0, bar_depth, box_height_offset])
    cube([box_width, wall, box_height]);

}
*/

difference() {
    cube([box_width, box_depth, box_height]);

    translate([wall, wall, -wall])
        cube([box_width - 2 * wall, box_depth, box_height]);

    translate([(box_width - 30) / 2, -wall, (box_height - 20) / 2])
        cube([30, 4 * wall, 20]);
}

translate([0, 0, -box_height_offset])
    cube([bar_offset - 1, box_depth - 6 * wall, bar_height - 1]);

translate([box_width - (bar_offset - 1), 0, -box_height_offset])
    cube([bar_offset - 1, box_depth - 6 * wall, bar_height - 1]);