This Ambar Classic A4 Commercial File Folder Box, with a 60mm marbled spine, is the ideal complement to reinforce and protect commercial-sized file folders. Sold disassembled for easy transport and storage before assembly, this box provides greater resistance to the folder, protecting documents from dust and wear over time. The marbled finish of the Classic line adds an elegant look to office filing cabinets. A practical and economical solution from Ambar for those who organize commercial documentation systematically and durably.