4 types of closure - The cat flaps have 4 locking modes: open inwards, open outwards, open in both directions, locked. You no longer need to open your door when your animal wants to enter the room. The cat flap makes your life easier and makes your pet more free at home Easy installation - This pet flap is suitable for brick walls, wooden doors, PVC doors and metal and can be integrated into doors and walls with a thickness of 2 to 5 cm. Includes detailed installation instructions and image descriptions. If you have any questions during installation, please feel free to contact us. PET MOSQUITO DOOR - Size L -- Frame dimensions: 24.5 x 28.5 cm ( W x H) - Door dimensions: 20 x 22 cm (W x H) - Thickness: 5.5 cm. Pet weight range: less than 12.5 kg Very quiet - This swing door is extremely quiet and offers optimal protection against drafts thanks to a special seal and a magnetic lock. The brush strip eliminates noise when opening and closing the door. Suitable for most cats and small dogs (Pomeranian, Yorkshire Terrier, Pekingese, Dachshund, etc.). WITH MOSQUITO NET DESIGN - The transparent flap is made of high-strength fiberglass, which protects against UV, has good transparency, protects against grabbing and biting of pets, resistant to moisture and abrasion.