Shuttle payload bay Extended Duration Orbiter pallet which provided 167 kg of additional liquid hydrogen and 1417 kg of liquid oxygen. These were utilized by the shuttle's fuel cells, providing electricity, oxygen, and water sufficient to extend shuttle mission duration to 21 days.
Status: Operational 1992. First Launch: 1992-06-25. Last Launch: 1997-11-19. Number: 12 . Gross mass: 3,571 kg (7,872 lb). Apogee: 261 km (162 mi).