RV ATV Cycle Truck Cargo Work Trailer Black Side Air Vent

This Closertowholesale RV ATV Cycle Truck Cargo Work Trailer Side Air Vent is an adjustable air vent that promotes airflow throughout a trailer by having a complete moon vent in the upper front corner and an additional moon vent in the lower back corner. It is made of hard plastic and does not flex. The package includes one vent with an inside piece and an outside piece, a bug screen with very large holes, and no mounting hardware. The vent is adjustable for multiple wall thicknesses and the outside flange dimensions are approximately 4-3/16" diameter while the inner tube sleeve is 1-1/2" long. Installation instructions are available online that recommend cutting a 3" hole in the wall and installing the round vent on the outside of the trailer by screwing or riveting it. Closing off the air vents from the interior would require rigging an additional feature on your own.