LESHINE Pet Door, Lockable Cat Flap Gate, Locking Wall Door Entry with Magnet and Seal Brush for Cats and Small Dogs (White) -- Visit the image link more details. (This is an affiliate link and I receive a commission for the sales)
X frame, Quiet cat flap gives your cat access to any room even when the door is shut. Perfect for the garage, laundry, or litter box room door. Transparent flap with magnetic closure is easy to install. Slide lock for denying access.