BX-6 : One-Place Basic System with Oxymizer includes:
Aluminum high pressure refillable cylinder, delivered empty 
170 liters/6 cu. ft. - 3.21" x 11.6" - weighs 2.2 lbs.
Low profile CGA-540 post valve with contents gauge and shutoff
Adjustable 12 position regulator, all brass interior
1 Oxymizer  conserving cannula
Cylinder duration at 10,000 ft: 12 hours w/Oxymizer, regulator set @ .25 lpm