Replacment for the rounded rubber feet that come with Makerbot Replicator 1.0, which I lost while loaning it out to some members of my hackerspace.The .stl file contains a single foot, so print 4 of them and use them in place of the feet that came with the machine. To keep the 'bot from sliding around on smooth surfaces, I also added self adhesive rubber bumpers to the bottom (OOK 50660, used for glass table tops and picture frames, probably purchased from a Michaels).