Whole House Fan Cover Insulated: The inner part is made of premium quality aluminum foil foam insulation material with a good Insulation effect. Ceiling Attic Fan Cover Size: Whole house fan vent cover measures: about 129x129cm. Comes with a self-adhesive strip that can attach more firmly without falling off, easy to mount and remove. Multifunctional Attic Insulation Cover: Attic insulation cover protects your home from temperature drops and moisture. Completely protects against heat loss in winter and excessive heating in summer. Apply for Any Vent: Whole house fan cover is easy to install on any vent in the home without the use of any tools; It can be fastened to the fan vent from outside the home without entering Wide Applications:Attic insulation cover is suitable for living room, bedroom, study, dining room, bedroom and other places, which can bring a lot of convenience to your life. Wheather in hot and cold weather, it can provide you energy-saving insulation and achieve the best in energy effectiveness. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Photo Color Material:Aluminum film insulation board Size:A:About 129x129cm Package Contents: 1 x fan cover 1 roll x Nylon buckle 5m Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.