About this article 4 Types of Closing: Cat Flap t have 4 closing options: open inward, open outward, two-way open, closed. You won’t have to open the door if your pet wants to enter the space. The cat flap makes life easier and makes your pet free at home. Easy installation - cat door is suitable for brick walls, wooden doors, PVC and metal doors and can be installed on doors and walls with a thickness of 2 to 5 cm. The cat flap is made of durable, tough ABS plastic weatherproof and easy to clean. Welcome door size - L-Frame size: 23.5 x 25 cm (width x height). Door size: 18 x 19.5 cm (width x height) Thickness: 5.5 cm. Very quiet: this door is extremely quiet and offers optimal protection against drafts with a special seal and magnetic closure. The brush bar eliminates noise when opening and closing the door. Agrees to most cats and small dogs (Pomeranian, Yorkshire Terrier, Pekingese, Dackel, etc.).