Maybe I misunderstood, but...

I installed this on a board and placed it in the bottom part of a low window so the dogs and cats can have easy access in and out of the house, instead of playing the in and out game with them. Lol!! The only thing I am not happy about is the way it is advertised as being able to be resized to fit different thicknesses. The board is an inch thick and still had to double the board where the door connects to maintain a proper fit. Other than this, works as expected, animals love the ability of going in and out on their own.

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