We offer PetSafe replacement flaps for our pet doors, whether you need to replace a flap on an electronic pet door, extreme weather dog door, plastic door or aluminum door. They are simple to change out and install the new one. They come in a slightly larger size to insure that the will fit correctly and snug around any pet door opening. We carry single flaps, double flaps, u-shaped flaps, and any replacement flap for all the pet doors we sell. Replacing an old, cracked, or broken flap will help with the energy efficiency of your dog door to keep out the unwanted weather, bugs and animals.