Four control methods: The cat door has four locking methods, inward open, outward open, two-way open and locked. You can use this cat flap to control the cat's moving range at will, without having to open the door or gate.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 flap can clean the cat flap garbage and reduce noise. Our cat flap has three sizes and three models, you can choose the model and color according to the size of the cat.Safe and non-toxic: The pet flap is made of ABS material, safe and non-toxic, and strong and durable. The middle flap is a transparent design, which is convenient for observing the situation outside the door. Suitable for small dogs and large, medium and small cats, please rest assured to use.High-quality after-sales service: In use, if you have any questions, please feel free to contact us, we will try our best to provide you with services. Size:M | Color:Brown The cat flap is the ideal companion for your cat/dog! Are you still afraid of cats running everywhere? 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. This will take only few minutes. Get the animal control door. The cat flap has four control methods: only inside, only outside, free entry and exit, and strictly prohibited. You can move 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 can also clean and prevent debris on the cat flap when entering and exiting that the cat flap gets blocked due to obstacles. This cat flap 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 waist circumference 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 model S" (thickness of S is 2cm) or model "M" (thickness of M is 5.3cm). If your pet's waist size is less than 23.5 feet, please select the "L" model (the L size is 5.3 cm thick).