Give your pets the freedom they deserve:Solid aluminum construction dog door with locking panel for exterior door application Soft, transparent single flap pet doors for tight weather seal Easy installation. The PetSafe Aluminum Pet Door gives your pets the freedom they deserve! The frame is constructed of solid aluminum and is easy to install with the appropriate tools. It features a soft, transparent flap that provides a tight weather seal. A locking panel located on the exterior of the door ensures your control of when and how it is used.