4 types of closure: cat door tont 4 possibilities of closure: open inwards, open outwards, in both directions 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 your pet free at home. 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. Suitable for most cats and small dogs (Pomeranian, Yorkshire Terrier, Pekingese, Dackel etc). Welcome door size - M - Frame size: 19 x 20 cm (L x H), Door size: 16 x 15.7cm (W x H), thickness: 5.5cm. Adopt transparent visual design: The transparent cover is made of fiberglass high strength, which protects against UV rays, good transparency, protects against humidity and abrasion. 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 2-5 cm. The cat flap is made of durable ABS plastic that is weather resistant and easy to clean.