Pets can get in and out freely: the pet flap compatible fly screen door is equipped with a magnet at the bottom and closes automatically. Two sliding locks on the bottom of the flap help you lock the dog gate door to keep your pet at home when you are not at home.Easy installation: our dog guard door is easy to install. You can install it yourself. The pet door package is included with screws and installation manual (English language not guaranteed).Size: Outer size: 9.8"x 12.4"; Inner size: 8.2"x 9.6", please choose the compatibleable installation location according to the size of the pet. This is compatibleable compatible most cat and dog breeds.Scope of application: pet doors can only be installed on existing screen doors, porches, windows or other screen windows. They cannot be used on very thick wooden doors and glass doors. If you have any questions during the installation process, please feel free to contact us.Material: dog flap compatible fly screen door is made of ABS material, safe and non-toxic, does not harm your pet and has a smooth surface, wear-resistant, corrosion-resistant, easy to clean and has a long service life.