Extra strong construction to withstand bending & crushing. Constructed from corrugated material that resists bending & crushing, ensures your contents arrive exactly as intended. Use them to ship artwork after a big gallery show or posters to clients looking for new advertising. Includes strong white caps that snap into each end of these tubes to provide an extra level of security while your package is traveling to its final destination. If used to ship items internally, these mailing tubes can be used repeatedly to reduce costs as well as your ecological footprint. Box / Tube: Tube; Box / Tube Design: Round; Diameter: 3"; Length: 30".