it is a simple box that I used to hold a micrometer. I lined it with foam . doesn't have a latch but I just use a rubber band.  I plan on gluing a magnet to the top and bottom of the lid for a latch but have not gotten to it yet. you can change your bottom and top print pattern to your choice. I personally think concentric makes the most attractive pattern for this. I printed PLA with 20% infill, but you do what ever makes you happy.