Alvin blue Ice Tube plastic document storage tube. Transparent PVC 2.75" diameter x 25" poster tube is designed for storing or carrying anything that can be rolled-charts, maps, blueprints, posters, drawings, artwork, etc. One end of the mailing tube is permanently sealed while the other end pops off to allow easy access. Blueprint tubes are moisture-proof and come with a removable, adjustable nylon web shoulder strap that can clip on or off for convenience and portability. Perfect travel carrying tube for students, pilots, contractors, draftsmen, architects, engineers, sportsmen, campers, boaters. Alvin MT25-BL Ice Tube is lead and phthalate-free, UV-protective. Made in USA.