PetSafe offers replacement flaps for all of their pet doors, including the electronic doors, extreme weather doors, wall doors, patio doors, classic doors, quick fit doors, aluminum doors and plastic doors. All of the replacement flaps are easy to install and are slightly oversized to ensure that they will fit around any door opening. You can choose from single door flaps, double door flaps, u-shaped door flaps and more. PetSafe's replacement pet door flaps provide maximum energy efficiency, keeping out extreme cold, heat, drafts, rain and unwanted bugs and animals.