Built-in screen built in a removable plastic grid/screen, Perfectly to block big things into your room, make your living more comfortable. 3 round vent cover widely use in kitchen, bathroom, office, meeting rooms as exhaust vent, dryer vent. Also compatible with a 4 inch inline fan system. Black design is simple and atmospheric, will not go out of fashion. Bottom soffit vent cap diameter 3.54 Inch, bathroom fan soffit vent kit made of high quality ABS, environment friendly no smells and non-toxic. The 45° slanted louver design allows for better air circulation and improved ventilation, providing you with a healthier life. The vent ABS louvered grille cover is suitable for wall mounting and ceiling mounting, perfect for kitchens, bathrooms, living rooms, bedrooms, conference rooms, offices and other places that need ventilation. 3 Inch Soffit Vent for Exhaust Fan with Built-in Mesh Screen, Black Round Soffit Exhaust Vent Cover ABS Louver Grille Cover, Eve Dryer Vent for Bathroom Office Kitchen Exhaust Fan