Ideal L - size Fit: Specifically designed for medium to large - sized cats and dogs, the L - size cat and dog door offers a perfect fit. It allows your furry friends to pass through comfortably without being too cramped or too spacious, ensuring they can use it with ease. Robust Material Construction: Made from high - quality, durable materials such as strong plastic and sturdy metal frames, this cat and dog door can withstand the wear and tear of daily use by energetic pets. It is also weather - resistant, suitable for both indoor and outdoor installation. Smart Dual - Function Design: Equipped with a two - way locking system, you can control whether your pet can enter, exit, or do both. Additionally, the door flap has a soft yet tough rubber material that reduces noise when opened and closed, and provides good insulation to keep the indoor temperature stable. Effortless Installation: The L - size cat and dog door comes with all the necessary installation hardware and clear, step - by - step instructions. It can be easily installed on most standard doors, walls, or windows, allowing you to quickly set up a convenient passage for your pets. Safety - First Feature: The edges of the door are rounded and smooth to prevent any injury to your pet while they are passing through. Moreover, the locking mechanism ensures that unwanted animals cannot enter your home, providing a safe and secure environment for your beloved pets.