No Pest Vent 4 in. J Block or Wide-Mount Dual Door Wall Vent in Brown NPJB - The Home Depot
Everbilt 4 in. Inline Vent Draft Blocker BD04HD - The Home Depot
Xcluder 3 Rolls of 4" x 5' Stainless Steel Wool Rodent Control Fill Fabric 162743 - The Home Depot
Amazon.com: Funmit 4" Louvered Dryer Vent Cover Outdoor Including Metal Bird Guard Screen and 2 Duct Clamp Compatible with 4 inch HVAC Exhaust Vent Duct Helps Keep Wind Rain and Snow From
Wall-E-COVER Deep Dryer Vent Cover 627843367758 - The Home Depot