... .Simple structure 3.Optimal quantity guarantee 4.Delivery on time Gas Fire Extinguisher1. Impregnate around minor fire whatever their cause , so ... and employ nitrogen as driving gas .4. Used to put out fires of solid organic matter, oil, flammableliquid gas in the initial stage ... in plants warehouses, institutions, schools, marketplaces,hotels, vehicles, vessels, etc. Gas Fire Extinguisher 400ml