Bankers Box Premium Storage Boxes, are made from 100% recycled board and are double sided to ensure maximum strength as a heavy duty box. This enables up to 6 boxes to be stacked on top of each other, saving storage space. Being heavy-duty these boxes are also ideal for frequent use and movement. With PrestoT technology these boxes can be assembled in just one second just by pushing the corners together, making these boxes the perfect time saving solution where a large number of boxes are required. These Tall boxes are able to hold Lever Arch Files as well as Ring Binders and Transfer Box Files.