HUGE COMPATIBILITY: This window seal kit for portable air conditioners is perfectly suited for all types of portable air conditioners and dryers. It features a unique design with two pipe channels that support a maximum circumference of 3M (118 in) for all types of window installations. KEEPS HOT AIR AWAY AND SAVES ENERGY: The use of high-quality sealing materials can effectively reduce the loss of cold air. Compared with air conditioning without the use of sealing strips, energy savings of up to 30% can be achieved, significantly reducing operating costs. EXCELLENT COOLING EFFICIENCY: The professional seal design blocks the backflow of hot outside air, increasing the cooling efficiency of the air conditioner by 35% and allowing the room to quickly reach the ideal temperature. CONVENIENT INSTALLATION: Innovative use of strong adhesive + durable zipper double fixing system, no need to punch holes to quickly install, 3 minutes can be taken in use.