【Suitable Size for Pets Up to 20 lbs】This cat door has an inside width of approximately 16 cm/6.3 inches and an inside height of 22.5 cm/8.86 inches, specifically designed for cats weighing up to 20 lbs. It provides sufficient space for your cat to enter and exit comfortably without restriction. 【Flap-Free Safe Structure】Featuring a flap-free design, this indoor cat door avoids the risk of catching your cat’s paws or neck. It requires no special training for your pet to use, enabling hassle-free and safe access whenever needed. 【Effective Sealing Performance】When securely locked, this interior cat door insulates against unpleasant smells and noise, while also preventing light from spilling out. It helps create a quiet and cozy living environment for both you and your cat. 【Easy Installation & Customizable Decor】Equipped with step-by-step instructions, this cat door is simple to install and takes about 20 minutes to set up. Its paintable surface allows you to adjust the color according to your preference, which adds elegance to your room decoration and blends well with your home style. 【Privacy Protection & Versatile Application】This cat door ensures your cat’s privacy and safe entry/exit, offering a secluded space for placing the litter box without disturbance. It is ideal for creating private areas in laundry rooms, bedrooms, basements and other spaces, meeting your cat’s need for independent activity.