1.Window Insulation for Winter,PVC plastic for windows to keep cold out,outstanding cold resistance,non - defrmation,tear - resistant,waterproof,chemical corrosion resistance, and Durably,It can also keep cool air in summer when using air conditioner,cool for summer and warm in winter with long life.suit octagonal windows,window sills,floor - to - ceiling windows,parallel moving windows,push - out windows,Package includes Window Heat Insulation Film 1 and Hook and loop tape1. 2.Window Windproof Insulation Film Sise:Our size are W H,The width of the hook and loop tape is 2cm, please measure accurately,1. If you need to stick it on the window frame, you must ensure that each side of the window frame is 5CM long,and the window frame must be smooth and flat.2. For the window frame set inside the wall,resulting in a narrow frame or no frame,it is recommended to add 4 - 5 cm to the w and H,and extend and fix it on the surrounding wall,The wall must be smooth and flat. 3.Easy to Install and Remove: the window plastic insulation kit is designed for simple installation and removal; The double sided tape simplifies the attachment process, allowing you to effortlessly secure the film onto your window frames; Please make sure the window frame surface is dry and clean before installation; At the end of the season, just remove our winter window insulation. 4.Weatherproofing Window Insulation Kits:This window film insulation kit will help prevent cold air from entering through windows, keeping your house warm in winter. It'll also help keep heat out in the summer. 5. Material:The thickened window film is made of clear plastic, which has good tenacity, cold resistant, tear resistant, so you can reuse the kit year after year.