Protect Your Vent Opening From Buildup Caused By Wind, Rain, Snow And Unwanted Pests With Our Supurr-Vent Louvered Outdoor Vent Cover. This Package Includes A Dryer Vent Cover Featuring Curved Louvers That Make Little Noise Even When They Open Wide For Maximum Exhaust Flow. Vent Opening Measures 4” (10.2) In Diameter, And The Total Unit Measures 6” Wide By 6” Long. This Vent Cover Will Easily Snap Into Place To Fit Over Your Vent Opening, And Can Be Quickly Secured With 4 Screws (Sold Separately). Made From Durable And Weather-Resistant Plastic With Uv Inhibitor Added To Hood To Prevent Sun Damage And Cracking, This Cover Is Sure To Last You A Long Time For A One-Time Purchase.