We are offering portable oxygen-po 234 as portable oxygen for travelers, sport organizer, hill climber, school, clinic, hospital, rescue teams and etc. more...
Oxygen (O2) - constitutes approximately 21% of the air we breathe, has a gaseous specific gravity of 1.105 makes it slightly heavier than air, and has a boiling point of –297.3°F (-183°C), it becomes a transparent, pale blue liquid that is slightly heavier than water. Oxygen more...