[NO DRILLING REQUIRED]: Portable, durable, quick, and easy to install. No drilling required. [WIDE COMPATIBILITY]: Fits all portable air conditioners and dryers and is compatible with most windows. [FUNCTION]: The window seal dissipates hot air from your room's exhaust hose by sealing the hose between the window frame and the window sash. [EASY TO INSTALL]: Fits 6-inch (15 cm) diameter exhaust hoses, easy to install at home, in RVs, and other indoor/outdoor applications. [STRONG COOLING PERFORMANCE]: With this ingenious design, your room can be cooled in less time, and the unit provides excellent cooling performance.