High quality material.The outer frame is made of durable polypropylene that is weather resistant and easy to clean. UV resistance, high transparency, can prevent animal attacks and bites, moisture-proof and wear-resistant. Easy to install.This cat door is suitable for brick walls, metal doors, wooden doors and PVC doors.Can be installed on 1 inch thick doors and walls. Low noise: This pet door is very quiet.Easy to use and very gentle.It is very dense and prevents air flow, making it very suitable for winter. Simple and high quality design.The transparent cover allows pets to see through the door.The exterior screen is waterproof, you can see the movements of cats or dogs clearly.Convenient and practical, this is a great solution that allows your cat to enter any indoor space while being fully controlled.Keep the door closed to keep a distance between dogs, cats and even at the right time.Package dimensions: 22 x 21 x 3.5 cm;300 grams