Enjoying Screen Pet Door, Pet Dog Door for Door Screen Window Automatic Magnetic Lock with Hanging Shaft Free Little host : Let you provide a free and safety exit and entrance for your pets to indoor and outdoor from this pet door. Use new entire joint shaft : The inside door will be jointed firmly with the dog door frame. The slippy surface material will not scratch pets skin when pet through the pet cat door. Safety : Magnetic open and close by your pets / Lockable pet screen door helps you to control your pets security. Size : Design for small to large dogs , cats , rabbits or reptile (Frame 13.6  18 , Inner 12  15.5) Home installation : Simple and convenience install at home, come with English installation instruction.