This cat flap is specially designed for kittens. Features multiple modes that provide easy access to pet controls. Lockable Security Dog Gate Puppy Cat Dog Gate Pet Entry Door Puppy Cat Hole < p>Uniform texture, stable structure, easy installation and very durable. The surface is smooth, the material is delicate, and the mothproofing is dense. Pet barriers are perfect for small puppies and cats that are used daily at home. Note: To ensure the cat flap fits your pet, please measure your pet before purchasing. feature: The frame and inner panel are made of two pieces inside and outside, which is easy to install. Use the plugin if the door does not allow than the control way: only outside or not inside. Suitable for all door and window mosquito nets, cat doors, dog doors, suitable for cats and small/medium/large dogs. Specification: 1. Cut two blades that can be controlled inside and out. 2. Disassemble the cat flap into two pieces. 3. Install the frame on the screen door and push the pins into the screen. 4. Glue the pin buckle and the screen with glass glue. 5. Cut the screen with the frame to form the frame. 6. The screen you cut can be installed between interior panels to keep mosquitoes out. 7. Hang the inner panel on the frame. 8. Attach the other (inner) frame.