These unique transparent PVC mailing and storage tubes are designed for anything that can be rolled, including charts, maps, blueprints, and posters. One end cap is sealed closed and the other removable. Tubes are moisture proof and have removable, adjustable shoulder straps. Shrink wrapped. Lead and phthalate free. The MR series is perfect for rolled documents. Moisture and dust proof with an adjustable shoulder strap. 25", 37", and 43" lengths with 3-7/8" inside diameter