Amazon.com has Deflecto Supurr-Vent Louvered Outdoor Dryer Vent Cover, White, 4" Hood (HS4W/18) on sale for $3.84.
- 4" (10.2cm) diameter vent opening; 6" x 6" total unit size
- Helps keep wind, rain and snow from entering outdoor dryer vents
- Dryer vent cover is easy to install and opens with ease for maximum exhaust flow
- Features curved louvers for quieter operation
- Durable and weather-resistant with UV inhibitor added to hood to prevent sun damage and cracking