3-D Printable Pet Door

This is a pet door for use inside the house for cats, small dogs, etc. It's great for allowing a small pet to escape a larger one or to keep larger pets from eating their food. The opening size is 7.75" high by 6.5" wide (196mm x 165mm). All parts can be printed except for a short length of coat hanger wire to act as part of the hinge. The door swings freely in both directions but you can install magnets at the bottom to limit its swinging. Recommend mounting the door 3 to 4 inches above the floor for all but the shortest of pets (e.g. kittens).
The front door frame slides into the telescoping rear door frame for a snug fit on doors of a variety of widths without glue, nails or screws; but there are 4 places for self-tapping screws to prevent the frames from falling out.

For a version that is suitable for passing through walls, check out Pitcherj's remix at http://www.thingiverse.com/thing:805527