Here are two pictures showing this box being printed.
In the first you see in this picture a box for a computer board to go into. All the sides and the bottom of the box were designed to be 2 mm thick.
In the second you see a close up view taken after the two outside and the two inside lines were printed. When I took the second picture, the printer was doing the "shaking" to fill in between at the other side of the box.
I want solid sides that are 2 mm thick. Since the nozzle is 0.4 mm, then there should be five lines around the entire box.