- Pet flaps door size: FLAP Size 2620.51.1cm/36311.1cm, outer frame: 29241.1cm/42371.1cm. This PET screen door is designed for screen windows or doors to allow your pets to get in or out. It’s so convenient that they can be covered indoors or outdoors. 2. Sturdy and Durable Pet Flap Door: Made of high quality ABS material which strong and durable.Easy to install, high temperature resistant, not easy to deform.Shecues reinforcements makes our screen door pet sturdy enough and never easily fell apart. It can last a long time. 3. Self-closing and lockable: Our dog screen door with built-in magnetic can keep the door automatically closed when your dog leaves. You can even lock the door to keep your pets out at night or when you are not at home. 4. Easy to install and use: Our dog screen door is easy to install. You can install it by yourself. It is also easy for your beloved pets to push or close the weight flap , your dog does not won’t feel heavy. 5. Versatile: It blocks