Endura Flap Dog Doors for Walls (Ships from Canada)

Installs in walls 5.08cm - 20.32cm thick (up to 20.96cm for Single Flap models and up to 22.23cm for Double Flap Models) Magnets along three sides of the flap for improved wind resistance Flaps resist 50 mph winds and endures -40 degree temperatures Option of Two Flaps for most insulation or One insulation Flap on inside frame Durable, long-lasting, aluminum tunnel and aluminum frames  The Endura Flap Dog Door for Walls is designed with an aluminum frames and tunnel for walls  5.08cm - 20.96cm thick for Single Flap models and 5.08cm - 22.23cm thick for Double Flap Models. The Endura Flap is the best pet door for extreme weather, manufactured with environmentally friendly, high insulation value polyolefin polymer flap material to save energy and insulate your home. With the ability to combat 50mph winds and -40 degrees Fahrenheit/Celsius temperatures, you'll no longer have to worry about energy loss or temperature fluctuation inside your home. If you live in an area with a severe cli