Specification: Features: 1. LARGE CAT DOOR FOR BEEFIER BREEDS: Own a bigger kitty like a Maine Coon, Burmese, Egyptian Mau? This cat door fits most cats. 2.MOST SECURE CAT PORTAL YOU CAN FIND: Most pet doors for cats fasten with flimsy tape. But this kitty door attaches firmly with sturdy screws. Installs in minutes; stays snugly in place. 3. KEEPS BIGGER DOGS AT BAY: This large cat door stops your big-breed dog from getting into the cat food kitty litter. 4. NO ANNOYING FLAP: Ever try training a cat to use a flap-covered pet door? It39;s an exercise in frustration. Fortunately, our cat door is 100 flap-free, so your pudgy feline can walk right through. 5. FITS SOLID HOLLOW DOORS:Unlike most big cat doors, our cat door fits interior doors with cat door39;s Size 22.5x27cmHxW. Unique design keeps cat39;s paws from getting stuck inside hollow-core doors. Notice: *Actual color may be slightly different from the image due to different monitor and light effect *Please allow 1-3cm deviation due to manual measurement Description: Size: 22.5*27*5.5cm Package List: 1 set x cat door with screws and screws cap