Locking Options: The cat flap offers 4 locking options: opening inwards, opening outwards, opening from both sides, and closed. You don't need to open the door when your pet wants to come in. The cat flap makes your life easier and your pet has free rein at home. Easy Installation: The cat flap is suitable for brick walls, wood, 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, weather-resistant, and easy-to-clean ABS plastic. Door Dimensions: Frame dimensions: 24.5 x 28.5 cm (width x height). Door dimensions: 20 x 22 cm (width x height). Thickness: 5.5 cm. Very Quiet: This door is extremely quiet and, thanks to a special seal and magnetic closure, offers optimal protection against drafts. The brush strip eliminates noise when opening and closing the door. Suitable for most cats and small dogs (Pomeranian, Yorkshire Terrier, Pekingese, Dachshund, etc.) Transparent Optical Design: The transparent cover is made of high-strength fiberglass, which protects against UV rays, provides good transparency, and protects against moisture and abrasion.