This Ambar Classic Solfado Unassembled File Folder Box, with an 80mm marbled spine, is ideal for reinforcing soldered file folders, commonly used in offices and administrative departments. Sold unassembled for easy transport, this box protects archived documents from dust, humidity, and wear over time. The marbled finish of the Classic line adds an elegant and uniform look to filing cabinets. A practical and durable solution from Ambar for those who professionally organize soldered documentation.