Adjustable Air Vents, ABS Round Soffit Air Vents Exhaust Wall Ceiling Vent Wall Ceilling Cover for Indoor/Outdoor Use (4'')

It does the job. It does not have 4" in dimmer. You have to cut the 4" flex pipe and use aluminum tape to do the connection.

Highly recommended, easy to install in uses. It is plastic but one installed in a wall or ceiling you wouldn’t know if you paid $8 or $80 and it works as you would expect

Very good vent works perfect.

We have a small bathroom and no ac vent in this room, so we extended a line into wall and connected this vent, love the pressure wings to hold it in place

Just what we needed