• Keeps hot air out of the room by blocking the hose between the window frame and the window itself. • Increases the efficiency of the mobile air conditioner by blocking the backflow of hot air. • Helps reduce energy consumption and CO2 emissions, especially in summer. • Easy installation without the need to drill holes: simply apply the hook tape and place the seal. • Universal and suitable for all portable air conditioners and dryers, regardless of the manufacturer. • Compatible with windows that open to the left, right, downward, or skylights, with a maximum circumference of 400 cm. • Product dimensions: 27.2 cm wide, 3.3 cm high, 16 cm long.