Magnets,Closes automatically This pet door for screens is designed for screen windows or doors and any other screened areas to allow in/out access for your pet. Pets can easily push open the flexible hinged door. Pls make sure that the width and the height(shoulder level) of the animal are inferior to the pet door. Fits all door and window screens Size Catdoor Large: 8W x 10H" (Inner); 9.5W x 11.4H" (Outer) Dogdoor Small: 9.2W x 12.4H" (Inner); 28W x 36H" (Outer) Dogdoor Large: 12W x 16H" (Inner); 14.1W x 18.1H" (Outer) Package: 1 x pet door
