Unique stylish design: is your cat square So why use boring square cat doors The cat door features a unique cylindrical design that allows even bored cats to have fun, garages, and more. Keep litter box smells away from the living room and dogs and babies away from cat food. Suitable for Small to Medium Cats: The maximum opening size of the flip cover is 8.3in. Fits kittens up to 12 lbs. If you use our free cat training tips, it will quickly learn to skip. Their claws or nails won't get stuck. DURABLE MATERIALS FOR LIFE: The cat door is unbreakable and scratch-resistant. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.