Chubby Kat is a large pet door for the weight challenged cat up to 25 pounds. It has an unbreakable Lexan flap and features 4-way locks. That means you can set the lock to give free access in or out; in but not out; out but not in; or completely locked in both directions.
The telescoping frame design insures that the core of the door through which you mount it is covered. This is important as interior doors are oftentimes hollow. Chubby Kat measures 7.5 x 10.5 inch and features 2-way operation.