Let your pooch show himself out with the PlexiDor Performance Pet Doors Dog Door Installation, Large. This door is sized perfectly for pals who weigh up to 100 pounds and features saloon-style K9 Composite thermopane panels. The four edges are designed with an energy efficient weather seal to prevent heat or cool air from escaping your home. The durable aluminum frames are scratch-resistant and are made to coordinate nicely with your home’s interior walls and appliances. And for extra security, the door includes a lock, key and steel security plate to give you peace of mind when you’re away from home. It’s also a convenient way to paw-sitively encourage your pooch to get outside for healthy exercise and activity!