A 50 kg trolley fire extinguisher typically refers to a portable fire extinguisher that is mounted on a trolley for easier transportation and maneuverability. This type of fire extinguisher is commonly used in industrial settings, large commercial buildings, or areas where a higher capacity fire extinguisher is required. The weight of the extinguisher, in this case 50 kg, refers to the total weight of the extinguisher and the trolley combined. Trolley fixre extinguisher is stored with powder, CO2. For Powder trolley extinguisher, container is stored with ammonium phosphate dry powder and nitrogen, which is applied for solid flammable stuff, flammable liquid& air, also live electric fire. This kindly of extingusiher is usually applied in factory, warehouse, ship, gas station.