A mix of elemental hydrogen, deuterium (H2), and helium-3 (He3), H-fuel can also be mixed with oxygen in fuel cells to provide water (via "cracking") and electricity for smaller ships, space stations, and other facilities. H-fuel production is almost totally monopolized by the Kusari who obtain their supplies from the Gas Miner's Guild before shipping it to storage depots and distribution facilities throughout the colonies.
