Four Control Methods: The cat door has four locking methods, inward-open, outward-open, two-way-open and locked. You can use this cat door to control the range of movement of the cat at will, without having to open the door or the door. Easy to install: This cat door is suitable for brick walls, metal doors, wooden doors and PVC doors. It can be installed in doors and walls with a thickness of 2 to 5 cm. A detailed installation diagram is included in the package, please follow the installation instructions. Easy to use and clean: This magnetic cat door is windproof, and the brush strip on the cat door can clean the garbage from the cat door and reduce noise. Our cat flap has three sizes and three models, you can choose the model and the color according to the size of the cat. Safe and non-toxic: The pet flap is made of ABS material, which is safe and non-toxic, and strong and durable. The middle flap is transparent design, which is convenient to observe the situation outside the door. Agrees to small dogs and large, medium and small cats, rest assured use. High-quality after-sales service: in use, if you have any questions, please feel free to contact us, we will do our best to provide you with services. Product description KATELUO The cat flap is the ideal companion for your cat / dog Are you still afraid of cats running around? This well-designed cat door provides a good environment for you to control your baby at will. Our cat flap is made of ABS material which is not only sturdy and durable, but also easy to install. It only takes a few minutes. Obtain the animal control gate. The cat flap has four control methods: inside only, outside only, free in and out, and strictly prohibited. You can move the pets inside the door according to your needs, not only. The brush on the cat flap can reduce the noise made when opening the cat flap and also can clean and prevent debris on the cat flap when entering and the exit that the cat flap is blocked due to obstacles. This cat door is not only suitable for kittens, but also for kittens, but also for small dogs. If you plan to use them on dogs, we recommend purchasing the L (large model) to ensure the pet's waistline is less than 23.5 feet. Please select the following sizes: If the pet's waist circumference is less than 15.5 feet, please choose the "S" model (the thickness of the S is 2cm) or the "M" model (l thickness of the M is 5.3 cm). If your pet's waist circumference is less than 23.5 feet, please select the "L" model (size L is 5.3 cm thick). Why choose us? Our cat door uses a four-phase magnetic controllable door, the resistance of the door is reasonable, and it will not get stuck due to the quality of the door. In order to provide the cheapest price to customers, we use also affordable prices. Customers bring the best cost-effective products.