Energy-efficient, sliding glass pet door has dual-paned glass—along with weather stripping to keep the elements out—and your heat or air conditioning in. Easy to install into your sliding glass door track with an adjustable height to ensure a proper fit. Includes 3 flexible, insulating flaps with a magnetic seal to help insulate your home. Use the security bar to keep your home secure without removing the pet door. Paw-fect for doggos and cats.