Anlin Freedom+ in-glass pet doors from California Energy Contractors are built to serve your pets for the long-term. With a heavy-duty aluminum frame and reinforced frame corners, they are made to withstand the rigors of frequent use over time even with multiple pets. The soft, flexible flap is gentle on your pets while being able to endure years of pounding. When pets enter or exit through the door, a magnetic flap gently seals the door shut. This, along with a specially designed pile weather strip helps form a weather barrier to keep your home comfortable.