One-way NATO40 Adapter

This is a One-way valve. This will only allow air to flow in one direction.

The colour of the middle body will be black, and includes the rubber umbrella valve.

 The colour options are for the rotatable connectors. 

Its important to note, the air will travel from A to B. Therefore in the image, A will be the male connector going up to the female connector (the arrow on the body also indicates the direction of the airflow)

Miss-use of this item can be dangerous, you use this at your own risk. This is a novelty item, use at your own risk.