1.This pet door can be a great way to monitor your pet and free up your time to open the door without worrying about your pet. At the same time, your pet will enjoy a big house free, preventing unwanted animals from entering your home 2.Easy Installation - This pet door is suitable for brick walls, wooden doors, PVC doors and metal glass doors, and can be installed on doors and walls 2-5 cm thick. thickness. The cat flap is made of plastic Durable, weather-resistant and easy-care ABS 3.Unique Design: Use the cat flap with 4 locking options to get cats up and down at will, or to keep them safe at home or outdoors. Closing options are: open inward, open outward, open in both directions, closed 4.High quality ABS plastic materials, durable, scratch resistant for your cat/small dogs. In addition, it is easy to clean and can be used for a long time 5. M: 19.7195.5cm, pet under 10kg, waistline under 40cm L: 2523.55.5cm, pet under 12kg, waistline under 60cm XL: 27.7255.5cm, pet under