Hon&guan 4'' Black Roof Vent Cap, Roof Vents For Houses Galvanized Steel Rooftop Dryer Exhaust Vent Cap, No Damper - Air Conditioner Parts - AliExpress
Roof Caps - Roof Cap Vents Made For Either Flat or Pitched Roofs - Four Sizes Available by S&P | kitchensource.com
Vent Caps for Liquid Propane and Gas-Fired Appliances - Roofing
Ventline 7.25" Vent Roof Cap and Flange | Mobile Home Outfitters
6 inch Vent Pipe Cap | 6″ Diameter Vent Pipe Cap | Model VPC-6
Aura Vent, 12 In Diameter Roof Attic Ventilator, Active Ventilation, Exhaust | eBay
RDP Rooftop Exhaust Vent Cap with Damper | Roof Vents