A nice carry case to transport your SpaceNavigator 3D Mouse. Comes with interlocking lid. The heavy SpaceNavigator fits snuggly inside and does not move. Printed in PLA at 0.3mm height with no supports. Tolerances are fairly close so make sure your printer is properly calibrated. The lid should snap into place without having to force it.Print in PLA or plastic of your choice. I made mine (and all the prototypes) in PLA with 0.3mm height and 15% infill. I probably wouldnt bother going over 0.2mm height or 20% infill. Should be nice and easy to print. No supports needed. But the lid is a fairly close fit, with only 0.4mm of play. So if you are overextruding or your printer is screwed, you may find the lid wont fit.