The 3-flap system delivers maximum energy efficiency that’s 3.5 times more efficient than single-flap system. Designed with a center insulated flap that helps keep warm air inside your home during the colder months and cool air inside during the warmer months. The flap color may vary between yellow or grey depending on when you purchase the door. Features a snap-on closing panel, so you can restrict your pet from using the door whenever you wish. The frame can be painted to match any door! Comes with instructions, a cutting template and all the hardware needed for installation. The PetSafe Aluminum Extreme Weather Dog & Cat Door has not one, not two, but three flaps to keep the heat or cold weather outside while giving your pet the freedom to come and go as she pleases! Not only does this heavily insulated door keep the air from outside out, but it also saves energy by keeping heat and AC inside your home where it belongs. The paintable aluminum frame also includes a snap-on panel for restricting access when you'd like to keep your furry friend inside. Every purchase comes with detailed instructions, a cutting template and all the installation hardware you need for easy installation. This is brand new - just wasn't needed.