Cat Doors: PetSafe Cat Flap 

PetSafe Cat Flap

Let your cat pass through any interior door. Give your cat access to her litter box without giving her litter box access to your home! This durable cat flap fits any interior door that’s 1” to 2” thick. Your cat can come and go from the room where her litter box is housed – even when the door is closed. A sliding lock gives you the option to bar access whenever you choose. For pets up to 12 lbs.