2B-6 : Two-Place Basic System 

Aluminum high pressure refillable cylinder, delivered empty 
170 liters/6 cu. ft. - 3.21" x 11.6" - weighs 2.2 lbs.
CGA-540 Low profile valve with contents gauge and shutoff
Adjustable 12 position regulator, 0 to 15 LPM, all brass interior
Splitter with connecting hose
2 Standard oxygen masks
2 Nasal cannulas
Cylinder duration at 10,000 ft: 2 hours w/standard mask @ 1.5 lpm