ABC or multi-purpose extinguishers utilize a specially fluidized and siliconized mono ammonium phosphate dry chemical. It chemically insulates Class A fires by melting at approximately 350 degree and coats the surface to which it is applied. It smothers and breaks the chain reaction of Class B fires and will not conduct electricity back to operator. Comes complete with mounting bracket. A complete range of sizes are available for all hazard requirements.