The file 'Egg Sac – Terrain Piece RPG 3D Printer Model' is (stl) file type, size is 1.6MB.
I found this Blender file by Danimal on opengameart.org. It is a really cool model and makes a great table piece.
I had to pass it through Netfabb, Meshlab, and Slic3r to get a printable stl out of it.
Egg_sac.stl | 3.9MB |