Widely Application: 4 inch round vent cover widely use in kitchen, bathroom, office, Boat ,meeting rooms as exhaust vent, dryer vent. Also compatible with a 4 inch inline fan system Built-in Screen: Built in a removable plastic grid/screen, Perfectly to block big things into your room, make your living more comfortable. MAIN FEATURES: Bottom soffit vent cap diameter 3.74 Inch, bathroom fan soffit vent kit made of high quality ABS, environment friendly no smells and non-toxic. Packaging Including: 2 Pack Soffit Vents Exterior Round Vent Cover with Built-in a Fly Screen Aesthetic Considerations: The soffit vent is designed to be discreetly installed under the eaves or soffits of a building, blending in with the exterior and providing a clean, unobtrusive appearance. COMPANY INTRODUCTION: We worked in foreign trade for 6 years, each year large of our products are sold to European country.High quality, great selling service, good reputation is our purpose. I believe we are your best choice.