This plant pot bracket supports small items (up to 70mm square) on the edge of the plastic surround on double-glazed windows. It expects the lip on the bottom of the window frame to be 7.5mm.
The model comes with a surrounding "oven", a one-layer thick box that is built as the model is built. This keeps the heat in and prevents cracking. If you are using an enclosed printing bed, you may be able to omit this.
Use 2 shells and no more than 15% infill or cracking/weakness will occur. Takes about 2 hours to print with accelerated printing on a Replicator.
More info at http://steveweller.com/replicator/plant-pot-bracket/