Also, the manufacturer recommends that you plan to 'frame in' this pet door even though it is intended specifically for a wall installation. The 'Wall Kit' extends the self framing feature to accommodate 2x4 and 2x6 stud walls. Weather-seal gasket and nylon window pile for added insulation. The magnet bar at the bottom 'floats' for a better seal at the bottom of the flap. This pet door is available in one size only and will accommodate very large dogs.
Flaps are fully weather-stripped and use adjustable magnets to ensure a good seal.
The double flap version is particularly effective against wind and provides superior insulation. A top rated pet door. It is the only one that becomes so fond of us that sometimes it cannot go on living after its master dies.