Features: Make of PP, Enduring and strong, wear-resistant, Not easily damaged. With fine meshes design, these vent covers effectively prevent any potential damage to your home while providing efficient ventilation. With 45° louver to prevent rainwater from flowing in. Builted in fine meshes grille to stop sundries and small pet from entering the house. Easy to install: Our vent covers installed by inserting the mouth into the ceiling or wall, then you only need to mount it on the wall with screws and silicon seal. Suitable for room exhaust and ventilation use, great for garages, sheds, offices, bathroom or campers, and anywheres else air is desired to travel through. Specifications: Component: PP Type: HP4WW/HP5WW/HP6WW Model 1: HP4WW Panel (border) size: about 150x150mm/6inchx6 Neck (round mouth) diameter: about 100mm=4inch Model 2: HP5WW Panel (border) size: about 200x200mm/7.87x7.87inch Neck (round mouth) diameter: about 125mm/5inch 3: HP6WW Panel (border) size: about 200x200mm/7.87x7.87inch Neck (round mouth) diameter: about 150mm/6inch Package Includes: 1pc Air Vent Cover note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.