Give Your Pets Freedom: Cat and Dog Door, Fits 1"-2" Hollow Solid Doors. Suitable for kittens up to 5.4 kg. Your four-legged friends can come and go on their time Durable construction: includes tinted flexible flap; ideal for indoor and outdoor use, in wood, PVC and metal Easy installation: no handyman required. Follow the instruction manual, use the die cut template and your cat will be jumping through in no time. Great Design: Clear flap allows your pet to see through the door, which reduces the fear of using it. The outer screen is waterproof. Durable, weatherproof flap that keeps out cold air. Stable materials: The cat door is shatterproof and scratch resistant. Built-in screws keep the door in place for many years.