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 the "S" model (the thickness of the S is 2cm) or the "M" model (thethickness of M is 5.3 cm).If your pet's waist circumference is less than 23.5 feet, please select the "L" model (L size is 5.3 cm thick).