A foot for steel tube cantilever-type chairs (http://en.wikipedia.org/wiki/Cantilever_chair) such as the Breuer chair. The foot snaps over the bottom 1" metal tube. A short stub fits into the hole on the bottom of the chair to keep the foot in place.Printed with a .4mm layer height and 2 perimeters in ABS. Make sure to place the stl side-down (not facing up) prior to slicing. When you slice the stl, the side walls that grip the tube should be solid perimeters only (no cross fill), which will make them flexible enough to expand and snap over the tube. I found that even though it is an overhang with no support, the stub is short enough that it prints fine. Your mileage may vary, meaning you may need to clean it up (round off the bottom of any drooping overhang) with a knife or dremel tool. If for some reason you need one without the stub, you can easily delete it from the sketchup file and re-export.