2kg CO2 Fire Extinguisher without pressure gauge. Externally painted with polyester resin, signal red to RAL 3000. Co2(Carbondioxide) Extinguishers are suitable for Electrical fires and are used in server rooms mainly. This can also extinguish Class B Fires such as Flammable liquids like paint and petroleum.?Squeeze grip operated with acetalyc resin body. All external valve parts are either in plastic material or protected against corrosion.