Flammable liquids such as gasoline, oil, and oil-based paint. These metals burn at high temperatures and give off sufficient oxygen to support combustion. They may react violently with water or other chemicals, and must be handled with care.
All ratings are shows on the extinguisher faceplate.
These extinguishers are capable of putting out more than one class of fire. Class A and B extinguishers carry a numerical rating that indicates how large a fire an experienced person can safely put out with that extinguisher. Class C extinguishers have only a letter rating to indicate that the extinguishing agent will not conduct electrical current. Class C extinguishers must also carry a Class A or B rating. Class D extinguishers carry only a letter rating indicating their effectiveness on certain amounts of specific metals.