4 Switching Modes Cat Door - cat flap door has 4 independent models to lock with switches - swing out only, in only, both in and out, and fully locked, easy control of your pet's in and out. You no longer have to open your door when your pet wants to enter/exit the room. Make your life easier and your pet feel free. Easy Installation - pet door is suitable for brick walls, wooden doors, PVC doors, metal doors, interior doors, exterior doors, and can be installed in doors and walls with a thickness of 2 - 5 cm. We have detailed installation instructions and image descriptions. If you have any questions during installation, please get in touch with us. Very Quiet - car flap door is extremely quiet and offers optimal protection against drafts with a special seal and a magnetic closure. Brush strip eliminates noise when opening and closing the door. Suitable for most cats and small dogs (Pomeranian, Yorkshire Terrier, Pekingese, Dachshund, etc.). Weatherproof Design - clear cat flap is made of high-strength fiberglass ABS, which protects against UV, has good transparency, protects against pet attacks and bites, and is resistant to moisture and abrasion.