Imperial tankers, employed by the Galactic Empire throughout the Galactic Civil War, were elongated, cylindrical transports. They were utilized for purposes such as the conveyance of tibanna gas.
A single tanker, at a minimum, took part in the raid on Bespin.
The 2001 video game Star Wars: Rogue Squadron II: Rogue Leader features Imperial Tankers. Star Wars: Rogue Squadron III: Rebel Strike contained a cooperative campaign version.