Freedom and convenience: The cat flap door allows your cats or small dogs to enter and exit easily and quietly. Your beloved pets won't feel trapped and you won't have to worry about opening or closing the door for them. Its versatility offers convenience and flexibility for your pet's daily movements, giving them the freedom to come and go to foster their sense of independence. Safer with 4 locking modes: By sliding the switches, you can control your pet's access and keep stray animals out. Durable and Convenient: Made of sturdy ABS plastic, the cat door is ready to serve your pets for a long time. With a sealing strip and a magnet to align it, it can keep out insects and the smell of cat litter, as well as reduce the loss of cold air in summer and heat loss in winter. Convenient transparent flap: Our pet door is designed with a transparent flap for your pet's safety, allowing them to see inside and outside at all times. The brush strip helps to reduce noise when your pet enters or exits. Large size and versatile: 25x5.5x27.7 cm (L x W x H) outer size, 22x20 cm (W x H) flap, this pet door is suitable for cats and small dogs with a waist circumference of less than 58 cm. Perfect for interior and exterior doors made of wood, PVC, metal, panels, glass, etc. Can also be installed in windows, walls, cat toilets, etc. Easy to install: the cat flap for exterior doors comes with detailed instructions, 8 screws and their caps. You can easily install it.