24.1 cubic foot medical oxygen tank with CGA870 post valve installed. Ready to perform in EMS, home oxygen, and hospital use. Cast from a special alloy that's extra resistant to corrosion, fractures, and damage for the utmost in safety and durability. Light, strong, and built to the highest standards of testing and quality Brushed finish and green painted dome, in non-sparking aluminum. Meets U.S. Department of Transportation (DOT) specifications.