[A Big Must for Portable AC]: No longer worry about hot air entering the room while the ac hose is exhausting. Simply install this window vent kit in the window opening and see how it keeps the indoor temperature comfortable and cool. Outstanding & Energy-saving! | [Upgraded 2-in-1 Coupler]: Our window kit for portable ac supports both 5.1"(for clockwise or counterclockwise) and 5.9" ac exhaust hose(only for counterclockwise). Suitable even for future replacement of hoses of different diameters. | [Lifesaver AC Window Kit with Full Accessories]: 4 x Window Seal Panels, 5 x Butterfly nuts(2pcs spare), 2 x Foam Sealing Tapes, 2 x Silicone Sealing Tapes, 1 x Exhaust Hose Adapter, 1 x Filter(The Hose is NOT Included). Perfect combination, sturdy and better sealing! | [Easy Peasy Mounting]: This ac vent kit is flexible enough to be installed quickly according to the included instruction. The Embedded Slide Rail on both sides makes a perfect fit between plates, also makes the adjustment much smoother(adjustable between 17" and 61"). | [First-rate Quality]: Our portable air conditioner vent kit has the advantages of high temperature resistance, not easy to aging, non-toxic and pollution-free. Can be installed horizontally or vertically, no shaking or slipping.