ADCO Deluxe Solar Vent Cover, White Vinyl With Reflective Silver Finish On One Side For 14" x 14" Roof Vent. Vent Cover insulates and blocks sunlight, moonlight or street lights from your RV's interior. Installs and removes easily in seconds using supplied Velcro. Rugged, durable vinyl with reflective silver finish on one side provides better insulation and blocks heat. 18" x 18" overall size will cover virtually any 14" x 14" roof vent. 3-Year warranty.