Folder archive 20 mm without cover page

The archive folder for documents without laces. Folder to formation, outfits and other things with the term long-term storage. Manufactured according to standards perepelinogo cardboard and has a valve for firmware documents. The retention period of 75 years.The height of the spine of the folder 20 mm. Size mm. 230х320 Cardboard with a thickness of 2 mm.