D & W (8840WH) Spaceport Air Conditioner Ceiling Vent Spaceport Outlet Vent for Ducted Air Conditioner Systems Designed as an upgrade replacement of the popular Aireport vents used in the ceilings of most RVs The Spaceport both opens and closes, and rotates for the ultimate in comfort control Easy to install; just remove screws of old vent and replace with the Spaceport 6-7/16 Inch overall Diameter; 4-5/8 inch hole size