Safe And QuietThis Pet Door Allows Your Cat To Enter And Exit Any Door Freely In Both Directions Without Any Obstruction. You Don'T Have To Worry About The Cat'S Tail Or Paws Getting Stuck In The Door When You Open Or Close The Door. With This Cat Flap, You Won'T Be Disturbed By Frequent Door Openings. Perfect Cat FlapThe Inside Diameter Of The Cat Flap Is 18Cm, Which Is Small And Light, Suitable For Kittens Weighing Less Than 30 Lbs. . The Cat Flap Can Prevent Big Dogs From Coming And Catching Kitten Food, Or Cat Litter, Which Can Effectively Protect Kittens' Territories Which Are Not Occupied By Big Dogs, And Give Your Kittens A Comfortable Life. Cute Cat DoorThe Cat Door Is In The Shape Of A Kitten, Which Is Very Cute. The Cat Flap Will Give The Kitten A Sense Of Home And Enjoy The Happiness Of Being Cared For By The Owner. At The Same Time, The Cat Flap Can Also Give The Kitten A Clear Guide. May She Find Her Hut Accurately. Easy InstallationAfter Opening The Door With A Saw And Electric Drill, Disassemble Our Cat Flap In Half, Install It On The Front Door And Back Door Respectively, And Finally Install The Screws And Dust Cover On The Cat Flap. In Addition, We Provide A Manual With Pictures And Texts, With Detailed Installation Instructions, And The Operation Is Very Simple. Wide Range Of ApplicationsThe Cat Flap Allows Your Kitten To Play Freely At The House. The Cute Cat Door Can Be Installed On Various Interior Doors, Such As Wooden Doors, Iron Doors, Glass Doors, Etc. , And Can Be Placed On Bedroom Doors, Laundry Room Doors, Garage Doors, Basement Doors, Etc. .