Reflective Insulation: Our window vent kit can effectively reflect sunlight with specialized aluminum insulation, reducing heat transfer compared to ordinary panels. This helps maintain a comfortable indoor temperature. Good Sealing: Made from quality plastic material, our portable AC window vent kit with a seamless sliding design is weather-proof and wear-resistant, providing reliable & long-lasting sealing. Removable Vent Mesh Cap: The portable AC window vent kit includes a removable vent mesh cap with a 5.9" exhaust port. It allows proper ventilation while preventing unwanted visitors from entering through the exhaust pipe. Adjustable Length: The window vent kit with aluminum insulation can be freely stretched and adjusted in length, with a maximum length of 47"/120cm, fit most vertical and horizontal sliding windows. Easy Installation: No complicated tools are required; simply adjust the window duct kit to fit your window and attach the insulation panels to the window frame. When not in use, it can be easily disassembled and stored, saving space. Chiligent Portable Air Conditioner Window Kit, 5.9" Diameter Adjustable Window Vent Kit with Aluminum Insulation, Reflecting Sunlight & Heat, Seamless & Insulated Portable AC Window Seal Kit