Heavy-Duty Removable Lid Style Shipping Case…..This heavy-duty shipping case is manufactured so the lid completely lifts off the case to expose the content within. This style of case is typically used for larger items that gt exposed when the lid lifts off for easy removal from the case. The Interior can be custom foamed to your specific requirements. Casters are available as well as locks and stacking options. Heavy-Duty shipping cases are designed to meet ATA ( Air Transport Association ) standards.