If your pet door is showing signs of wear and tear, a new PetSafe Classic Replacement Single Pet Door Flap could help make it look brand new. This soft, tinted dog door replacement flap has a magnetic closure to help keep your home protected from the outdoors and replacing it is a quick and easy installation project. The only tool you need is a screwdriver. Dimensions for the medium size replacement pet door flap are 8-1/8 in x 12-7/8 in. It includes 4 holes at the top of the replacement pet door flap for adjustment. This replacement pet door flap fits the following PetSafe doors: Extreme Weather Pet Door, Wall Entry Pet Door, Sliding Glass Pet Door, Freedom Patio Panel Door, Freedom Aluminum Pet Door and Plastic Pet Door. Trust PetSafe to help keep your pet healthy, safe and happy.