Pets can enter and leave freely: The cat flap is equipped with magnets on the underside and closes automatically. Two sliding latches at the bottom of the flap help you lock the dog door, keeping your pets home when you’re not home. EASY INSTALLATION: Our dog doors are easy to install. You can install it yourself. The cat flap package includes screws and installation instructions. Size: Inner frame size: 28cm33cm; Outer frame size: 34cm44cm, please choose a suitable installation place according to your pet’s size. This applies to most breeds of cats and dogs. Scope: The cat flap can only be installed over an existing screen door, hallway, window or other screened window. They cannot be used for very thick wooden and glass doors. If you have any questions during installation, please feel free to contact us. Material: The mosquito net door dog flap is made of ABS material, which is safe and non-toxic, harmless to your pet, smooth surface, wear-resistant, corrosion-resistant, easy to