Device which extinguishes flame. Fire extinguishers may contain liquid, dry chemicals, or gases (carbon dioxide or others). They are tested and rated to indicate their ability to handle specific classes and sizes of Fires. as follows: Class A Extinguishers : For ordinary combustibles, such as wood, paper and textiles, where a quenching/cooling effect is required. Class B Extinguishers : For a flammable liquid and gas Fires, such as oil, gasoline, paint and grease, where oxygen exclusion or a flame interruption effect is essential. Class C Extinguishers : For Fires involving energized electrical wiring and equipment, where the non-conductivity of the extinguishing Agent is of prime importance. Class D Extinguishers : For Fires in combustible metals such as magnesium, potassium, powdered aluminum, zinc, sodium, titanium, zirconium and lithium.Fire Insurance : Mid-Term Cover : Generally not permissible for STFI and/or RSMTD perils. If allowed it is subject to insurers must receive specific advice along with required additional premium in cash or by draft. Mid-term cover to apply for entire property at one complex/compound/location. Cover shall commence 15 days after the receipt of the premium at applicable short period scale on full sum insured at one complex/compound/location.