Amerex A412, 20 lb. BC Extinguisher with wall bracket. REGULAR extinguishers contain a siliconized sodium bicarbonate based dry chemical with free flowing and non-caking additives. Economical Class B & C protection with lower initial cost and recharging. This chemical smothers fires in flammable liquids and pressurized gases and will not conduct electricity back to the operator. Hose and nozzle design with Anodized Aluminum valve. 120B:C UL & ULC Rating and FM Approved.