PetSafe Extreme Weather Pet Door Medium, Easy Install, Insulating, Weather Proof, Energy Efficient, 3 Flap System

The perfect door for extreme weather conditions. Comprising 3 independent leaves, it protects the home from extreme temperatures while giving pets the freedom to come and go as they please. This well-designed door offers maximum energy efficiency, which is 3.5 times greater than standard single-leaf doors. A closing panel is included to reinforce insulation and better control pet access to the door. The frame is made of solid, impact-resistant and durable plastic, capable of withstanding the most energetic pets. Easy to install, it fits most doors between 4.1 cm and 5.7 cm thick. This model is not suitable for glass surfaces.