Cowled Gravity Flap Wall Outlet Non-Return Valve Cowl Duct Cover Air Vent Grille

Cowled Wall Outlet - Protects against ingress of rain and wind. Ducting Cowl. Gravity Flap. This grille can be used as a part of a long ductwork run for a variety of purposes. Air Vent Cover. Hydroponics fan, or In-Line Extract Fan.

eBay