1.EFFICIENT COOLING Enjoy a cool environment in summer. The gasket helps create a tight seal around your open so your portable air conditioner or dryer is more efficient and cools your room in less time. Adjust the tension rope around the nozzle of your hose to block the backflow of warm air. 2.Size: The seal is available in 200 cm and 300 cm lengths, making it suitable for various portable air conditioners, dryers, exhaust dryers and dehumidifiers. It is designed for frequently used tilts or wings that open to the left or right, hanging down s and roof windows. Not compatible with sliding doors or doors. 3.Easy installation: Simply attach the singletube mobile air conditioner sealing cloth to the and adjust the tension rope. The waterproof windscreen cloth and soft cloth ensure a secure and firm fit. No complicated steps or tools required. 4.Solid material: Made of polyester, the seal is sturdy and durable. It can withstand regular use and effectively prevent warm air from entering your room, maximising the cooling efficiency of your portable air conditioner or tumble dryer.