This will project clear and blurry shadows during the eclipse, as well as the pinhole projection of the eclipse itself. You will be able to see how the alignment with the solar new moon affects the sharpness of the shadows. I designed it in inches, and your slicer may need to scale it by 2540%. The thickness works best at .25 inches, which makes the area around the pinhole projector a single layer on most machines. If you need to scale it to fit the print bed, keep the Z axis unchanged and scale the X and Y axes by the same amount.