Fiberboard poster mailing and shipping tubes. These strong jute fiber mailing tubes are economical alternatives for storing and mailing anything that can be rolled, including charts, maps, blueprints,drawings, and posters. Includes tight slip caps and reinforced metal ends. Blue, white, or orange paper wrap, depending on size. Inside lengths: 25, 31, 43 inches. Inside diameters: 2.5, 3, 4 inches. Alvin fiberboard poster tubes are made in the USA.