Size - Flap opening size is 8." W x 10.2" H, For small dogs and cats. Material - Made of sturdy plastic and ABS material, durable and safety. Feature - Dog flap has a slide switch so that your pet can in or out under your control, and bottom of the flap has magnet keep door can automatic closed. You can lock the screen door when you don’ t allow the pet out/in. Usage - Frame mounts directly through any standard screen door/window to provide a discrete and attractive entrance for your pet. Easy install - Installation instructions in the package.