A-15 : Two-Place Advanced Aviation Oxygen System 
Aluminum high pressure refillable cylinder 
255 liters/15 cu. ft. (4.38" diam x 16.5" - 5.1 lbs.)
Standard CGA-870 toggle valve
Adjustable 12 position regulator (0 to 15 LPM) with contents gauge and shutoff, all brass interior
2 Standard oxygen masks, 2 standard nasal cannulas
Cylinder duration at 10,000 ft: 2.4 hours w/standard mask @ 3 LPM
Using Oxymizers, duration increases up to 75%