Suitable for hollow and solid doors: With its smart design, your pet gate creates a safe, finished opening in any interior door 1.25" to 1.75" thick. Kittens (and kids) won't get their paws and fingers caught. BARRIER-FREE HOLE: Creates a safe, finished opening that allows your cat to walk in and out freely to access their food and food. litter. The barrier-free design of the pet door allows pets to easily enter and exit the room without assistance. CUTE KITTY SHAPE: Stylish cat door perfect for cats and small pets to pass through the door. The kitten shaped cat door has an look. Every kid and every family will love owning it. PREMIUM QUALITY: The frames are made of high-grade ABS material and can be installed in laundry rooms, bedrooms, basements, and any room you wish to designate as your cat's own.