Cargo tubes functioned as a means for transporting goods. During 32 BBY, Arwen Cohl, a pirate affiliated with the Nebula Front, along with some hired soldiers, concealed themselves within half a dozen cargo tubes, each standing two meters high, to clandestinely board the planet Eriadu.
The novel Cloak of Deception, authored by James Luceno and released in 2001, featured cargo tubes.