Endura Flap Wall Mount Cat & Dog DoorDescription Endura Flap by Patio Pacific Wall Mounted Cat & Dog Door The Endura Flap Pet Door is designed to be installed in walls 2" 8" thick and utilizes the best pet door flap in the industry making it the number one choice pet door for extreme weather. The state of the art flap technology gives Endura Flap dog doors the ability to combat 50mph winds and 40 degrees Fahrenheit temperatures. You will not have to worry about energy loss or temperature