What type of enclosure should be provided for handling unfired aerial shells?

When handling unfired aerial shells, the appropriate type of enclosure is a fiberboard box. This selection is based on the characteristics of fiberboard, which is designed for transporting and storing pyrotechnics safely. Fiberboard boxes are lightweight yet sturdy, providing adequate protection for the contents while also being compliant with safety regulations.

Fiberboard's chemical composition and structural integrity make it suitable for preventing moisture exposure, which is essential in maintaining the shell's performance and safety. It also provides a good balance between durability and weight, minimizing the risk of injury or damage during transport or while being handled.

In contrast, alternative enclosure materials such as plastic buckets and cardboard boxes do not provide the same level of protection or compliance with safety standards necessary for handling sensitive materials like aerial shells. Wooden crates, while sturdy, are typically heavier and less practical for this specific application, making fiberboard the preferred choice.