BX-15 : One-place Basic Aviation Oxygen System with Oxymizer

Aluminum high pressure refillable cylinder 
425 liters/15 cu. ft. - 4.38" x 16.5" - weighs 5 lbs.

CGA 540 low profile valve with gauge and shut off

Adjustable 12 position regulator, 0 to 8 LPM, all brass interior
 
Oxymizer conserving cannula

Cylinder duration at 10,000 ft: 30 hours w/Oxymizer, regulator set @ .25 lpm