For those that live in areas with an extreme climate, the PetSafe Extreme-Weather Pet Door was made for you. The unique three-flap system keeps hot and cold weather out of your home while still letting your pet come and go as they please. Snap-on closing panel is included to allow you to control your pets access. Additional closing panel (not included) can be used on outside for additional protection. Imported. Available: Small (11H x 7-1/2W frame, 8-1/4H x 5-1/8W flap) Medium (15H x 10-1/2W frame, 12-1/4H x 8-1/8W flap) Large (19-7/8H x 12-1/2W frame, 16-1/4H x 10-1/8W flap) Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Pet Doors.