What is a "coil vent" used for in the context of transporting metal coils?

A "coil vent" plays a crucial role in the transportation of metal coils by serving as an opening or slot that allows air to escape from the packaging. This is important because, during transit, changes in temperature can cause air to expand inside the packaging, leading to a potential buildup of pressure. If not alleviated, this pressure can cause damage to the coils, the packaging, or even create hazardous conditions. The coil vent effectively mitigates these risks by preventing such pressure buildup, ensuring the integrity of the products being transported.

While other options may pertain to handling and managing metal coils, they do not specifically address the primary function of a coil vent in relation to air management during transportation.