About this item Cat Door: Easy Installation for Interior Walls - Weatherproof Flap, Suitable for Cats and Small Pets up to 21 lbs Enhanced Convenience: The Cat Door offers a hassle-free installation process that is specifically designed for interior walls. With its easy installation instructions, you can have the cat door up and running in no time, providing a convenient access point for your feline companion. Ideal for Cats and Small Pets: Designed to accommodate cats and small pets up to 21 lbs, this cat door provides the perfect entryway for your furry friend. It allows them the freedom to explore different areas of your home while ensuring their safety and security. Durable and Pet-Friendly Design: The Cat Door is built to last. With its durable construction and pet-friendly features, it can withstand regular use and the playful nature of your pets. The large size flap offers easy access for your cat without compromising on sturdiness. Quick and Easy DIY Setup: The Cat Door comes with a sleek black frame that adds a touch of elegance to your home decor. Its convenient DIY setup requires no special tools or skills. With step-by-step instructions, you can easily install the cat door within minutes, saving you time and effort. Versatile Usage for Dogs and Kittens: In addition to cats, the Cat Door is also suitable for dogs and kittens. With its medium-size flap, it accommodates various small pets, expanding its functionality and versatility within your household. Safe and Injury-Preventing: The interior cat door is thoughtfully designed to prioritize the safety of your pets. By eliminating sharp corners and potential hazards, it minimizes the risk of injuries, ensuring a secure environment for your beloved furry companions. Crafted from high-quality materials, this cat door guarantees durability and long-lasting performance. No-Flap Design for Interior and Exterior Doors: Unlike traditional cat doors with flaps, the Cat Door is designed with a no-flap feature. This unique design makes it suitable for both interior and exterior doors, allowing your cat to move freely between different areas of your home without any barriers.