The Medium Aluminum Black Dog Door is a heavy-duty, locking flap door designed for medium-sized dogs. Made from durable aluminum, this in-door dog door provides security for your home while allowing your furry friend the freedom to come and go as they please. The locking feature ensures that your dog stays safe while the sleek black design adds a stylish touch to your home. Perfect for pet owners looking for a reliable and secure solution for their canine companions.