The Delonghi AS00003650 Portable Air Conditioner Flange Stopper, a must-have accessory to enhance the efficiency and functionality of your portable air conditioner. This flange stopper is specifically designed by Delonghi to ensure a perfect fit and seal, preventing any air leaks and optimizing the cooling performance of your unit. Say goodbye to unwanted drafts and hot spots in your room with this essential component. Keep your space comfortably cool and enjoy the full benefits of your air conditioner with the Delonghi AS00003650 Portable Air Conditioner Flange Stopper.