"The Manager" cardboard blueprint storage box by Advanced Organizing Systems. This upright roll file is an economical, durable solution to organizing plans, blueprints in-office or permanent storage. Sturdy, stackable, attractive corrugated cardboard blueprint storage with reinforced bottom to prevent breakthrough. Stack side-by-side or on top of each other. Gray lettering on white background. Blueprint file organizer has side handles with identification labels on interior and exterior. Acid-free. Stores documents up to 36" in length. Manage documents from 22x34 to 36x48. Features sixteen 4" x 4" slots. Partitions can also be removed to create four 8" x 8" slots. Size: 16 x 16 x 37. AOS MGR-37 upright roll files are made in the USA.