AOHUA M16 male dust cap for waterproof connector

This is a dust cap for the proof of connector that is unplug. In actual application, the connector with male to female version will be in the state of plug or unplug. If the connector is unplug, the pin of male or female connector will be exposed in to the air. So the pin will be collecting dust or soaking in the water. In this way, the dust cap was born at the right moment.