Quick installation: Simple do it yourself project without cutting into walls or doors; Patio panel adjusts from 75 7/8 inches to 80 11/16 inches to fit your door frame Variety of sizes and colors: Use the sizing chart to find the perfect size door for your best friend; door is available in 3 color options Perfect for renters: Sliding glass door insert is perfect for apartments because the door is detachable so you can easily move it with you Energy efficient: The tinted, flexible flap uses a magnetic closure to keep the outside heat and cold out of your home Strong and Durable: Made to withstand heavy use, the door is built with weather resistant aluminum and shatter resistant tempered glass Controlled access: The slide in closing panel allows you to securely control your pet's access to the outdoors U.S.