B-4: One-Place Basic Aviation Oxygen System 113 liter/4 cu. ft. cylinder with CGA-540 low profile valve with gauge and shutoffAdjustable flow regulator, 12 positions, 0 to 15 LPMMedium concentration oxygen mask
2B-4: Two-Place Basic Aviation Oxygen System 113 liter/4 cu. ft. cylinder with CGA-540 low profile valve with gauge and shutoffAdjustable flow regulator, 12 positions, 0 to 15 LPMSplitter with connecting hose2 Medium concentration oxygen masks
B-6: One-Place Basic Aviation Oxygen System 170 liter/6 cu. ft. cylinder with CGA-540 valve with gauge and shutoff, Adjustable regulator, standard oxygen mask
BX-4: One-Place Basic Aviation Oxygen System with Oxymizer Provides 7 hours of oxygen at 1 LPM equivalent113 liter/4 cu. ft. cylinderCGA 540 low profile valve with gauge and shutoffAdjustable regulator - 12 positions, 0 to 15 LPMOxymizer conserving cannula
2B-6: Two-Place Basic Aviation Oxygen System 170 liter/6 cu. ft. cylinder with CGA-540 low profile valve with gauge and shutoff, Adjustable regulator, splitter with connecting hose, 2 Standard oxygen masks
B-9 : One-Place Basic System 255 liter/9 cu. ft. aluminumcylinderCGA-540 low profile valve with gauge and shutoffAdjustable flow regulator, 12 positions, 0 to 15 LPMMedium concentration oxygen mask