If you struggle to make it home in time to let your four-legged friend out for potty breaks, the PetSafe Plastic Pet Door with soft flexible flap lets your pet come and go on their schedule. The snap on closing panel allows you to control your pet's access and keep stray animals out of your home. Installing the pet door is a simple do-it-yourself project and you can paint the frame to match your door's existing color. Flap opening dimensions 8 1/4" x 12 1/4". Great for pets up to 40 lbs.