If you want to give your furry friend the freedom to go outside whenever they want, then this pet door is perfect for you. With a durable plastic frame that can accommodate medium to large dogs, you can be sure it will last. The flexible transparent flap and the sturdy metal bar at the bottom ensure the flap closes silently every time. Use the removable and lockable metal panel to control your pet's access and prevent unwanted animals from entering your home. The paintable plastic frame of the door can be matched to your door's existing color, ensuring that it blends in with your home seamlessly. This pet door is designed for easy DIY installation and works with interior or exterior wood, PVC, metal, and paneled human doors up to 1.25 inches thick.