Corrugated mailing tube features a unique, square-shape design to easily insert and remove your contents. Square construction will not roll on conveyors or off flat surfaces. Four-sided shape allows it to ship and store flat to take up less space and stack easily. Lightweight material helps reduce the high costs of shipping. Eco-friendly design is made with post-consumer materials to reduce the overall impact to the environment. Mailing tube is perfect for shipping, moving, filing and storing.