Universal fire extinguishing spray 600 ml. For classes A + B + fat fires. Fire class A are solid substances that often burn with the formation of embers. Fire class B are fires of liquid substances or those that are there under heat. Fire class F describes simply flamed edible fat or oil, especially at the stove or deep fryer. Here the widely used powder extinguishers are unfortunately largely useless, they can even distribute the fat with their pressure.