Adjustable Universal Size:The Portable AC Window Seal Kit size in (Width)10x40~59 inch(Length), length is adjustable from 40~59 inch, matching all portable air conditioners and air dryers, fit horizontal or vertical SLIDING WINDOW ONLY (single-hung and double-hung). Better Sealing:Replacing the old zipper design with a drawstring to allow the sealing fabric to snugly fit around the exhaust hose from 1~6 inch, this newly designed AC Vent Kit has an excellent sealing effect of true “0” gap, firmly lock the indoor cool air while also prevent outdoor heat flowing back, keep out rain, mosquitoes bugs etc. Special waterproof TU fabric with heat-insulating whitening process reflects the sun's rays efficiently, fast cooling, real energy-saving and money-saving. More Reliable Design:This Air Conditioner Window Vent Kit is specially designed to solve the problems of zipper type whose sealing is lacking, zipper bursting and easy to slip off, and complicated installation. Simplify the design and