1. Expandable Storage Tube: The storage tube could expand from 63 107cm/24.8 42.12inch and the diameter is 8cm/3.15inch, so it can handle various poster dimensions. 2. Unique Lock Design: Twist it according to the arrow direction, and it can easily and firmly lock your favorite poster in the tube case safely. It has a removable transparent cover on the lid that allows you to add identification or labeling to the tube. 3. Strong and Lightweight: The Poster Tube is made of rigid plastic to protect contents from bending or creasing during transit. The document tube is also waterproof and light resistant, protecting documents against fading from exposure to sunlight. 4. Adjustable Belt: The Carrying case has an extra long shoulder strap that is comfortable to use even when the tube is fully extended. 5. Unlimited Use: The plastic tube can be used to store and transport posters, blue prints, maps, documents, large photo prints, drawings, artwork, arrows, fishing rods, drum sticks, or whatever else you can imagine.