Professional-Grade Heavy-Duty Storage Boxes, Letter/Legal Files, White, 12/CartonMaximum durability boxes are engineered specifically for active files, harsh environments, and professional records management applications where reliable file storage is critical. The automatic, instant set up that doesn't require tape, allows you to get organized quicker. Built with triple panel construction all sides to ensure maximum durability and dependability. 3" deep detachable, lift off lid.