Increase Cooling Performanc Enjoy a cooler environment in summer thanks to Portable Air Conditioner Window Vent Kit! Window seal is made of special waterproof and heat insulation fabrics, It can blocks the return flow of warm air, so that your mobile air conditioning unit can be more efficient and cools your room in less time. Adjustable Size Portable air conditioner adjustable window kit. You can adjust the length according to your needs. Its adjustable range is 35-60inch, suitable for single/double-hung windows of 35-60inch and sliding windows of 35-60inch in height, and suitable for hoses of different sizes. Wide Application It is not only suitable for portable air conditioners, but also suitable for exhaust of air purifiers, dryers, exhaust clothes dryers and dehumidifiers. Easy To Install You don't need to buy a hose adapter or other additional tools, You only need a set of window seal to solve it perfectly.Simply apply the adhesive hook tape to the inside of your window frame and to the window itself. Attach the window seal to the hook tape. Then put the air conditioner hose into the window seal. Finally, tighten the drawstring. Simple as it is. Material Made of environmentally friendly waterproof coated fabric. With self-locking zipper,it has very good adhesion but leaves no trace after tearing off and can effectively block the hot air outside.