Manager Rolled Storage Roll File System by Advanced Organizing Systems – This economical roll file solution for organizing blueprints, drawings, plans, or maps, or plans in the office or permanent storage. The roll files are sturdy, stackable, attractive corrugated cardboard with reinforced bottom. Gray lettering on white background. Side handles with identification labels on interior and exterior. The MGR-25 and MGR-37 have 16 slots at 4" x 4", or partitions can be removed to create 4 slots of 8" x 8". The MGR-37-9 has 9 slots at 5.25" x 5.25"