This stackable desk organizer features 4 trays that let you stack multiple units to maximize storage space or use them separately, with an extra small top tray for office supplies. Its unique design transforms into a laddered shape, creating a stepped layout for easy file retrieval. Assembly is simple-no screws or tools needed, just stack the trays one by one. Made of high-density metal mesh and thick iron, the 4-tier organizer is durable and sturdy, resisting deformation with its reasonable structure. Each tray stands 2.8 inches tall, and three stacked trays reach 12 inches, providing ample space for office supplies and paper files to keep your desk clean and tidy.