Advanced Organizing Systems (AOS) cardboard blueprint storage boxes and upright roll file organizers are economical methods to store and organize most any type of rolled document. Perfect for blueprints, maps, plans, posters, etc. Compact yet durable, AOS cardboard blueprint holders are economical, durable solutions to organizing plans and blueprints in-office or permanent storage. Sturdy, stackable, attractive corrugated cardboard blueprint storage with reinforced bottoms to prevent breakthrough. All cardboard rolled document organizers are shipped flat and easily set up in minutes. Quality-made in the USA.