Endura Flap Pet Doors for Walls are manufactured to be flexible, safe, and energy efficient in all climates. The transparent, dual-pane flap seals tightly against the outside weather using a patented system of magnets. These doors have a dual-pane flaps for energy efficiency. When closed, the flap reduces air conditioning and heat loss. Each unit permanently installs into your wall and includes a locking security panel. Comes with: Interior and exterior frame, security panel, mounting hardware and installation instructions.