The PetSafe Freedom Patio Panel Pet Door allows your dog or cat to come and go as it pleases through your sliding glass door. These doors feature a heavy-duty aluminum construction and shatter-resistant, tempered safety glass. It's also equipped with the energy-conserving ultraseal flexible flap system designed to keep the heat and cold outdoors. Durable aluminum frame including weather stripping and slide-in closing panel for weather resistance. Easy Installation! Slide the panel into one end of your sliding door track, secure it to the frame and add weather stripping; no cutting required. Product Dimensions: 2.31"W x 81.5"H.