This is a 3d printed adapter that goes onto some 1973-1979 Ford trucks that have factory AC, at the housing that is at the center of the truck, and for the port that points towards the driver side, feeding the vent that is built into the instrument cluster. It adapts to common 3" round ducting. Ducting is not included; this is simply an adapter. Note how it has provisions to lock into the factory wedge tabs for a secure connection. It should be installed so the offset holds the hose higher.
This is the ducting that comes out of the gauge cluster trim piece. functions same as original.