Cat door — For interior door gives a hole in the door. & nbsp; Safe and Secure — The cat door, left in the door, allows the cat to enter and exit the room freely, and it is no coincidence that the cat’s tail is hanging or caught through the door, effectively protecting the cat. Keep the baby away from the litter box — It is a good safety measure to close the cellar door or door, but allow cats to enter the cellar to obtain their litter box. Wide Applications — Size 7 x 6.5 inch Cat door hole suit for most types of cats. It can be used on a hollow chamber door. Easy to install — This interior pet door is shaped like a cat’s head and is made of high quality thick plastic.