A Class D extinguisher has a specialist chemical makeup and application as well as that of its fire fighting capabilities. The extinguishing agent absorbs the heat and smothers the flames, which restricts the oxygen, thus putting out the fire. Like ordinary dry powder extinguishers, a Class D fire extinguisher is red in color with a band of blue located in the top half of the canister which covers no more than 5% of the body. This kind of specialist extinguisher will have some kind of indication on the label that it is designed for Class D fires so it can be identified.