This Amerex regular dry chemical (BC), stored pressure, wheeled fire extinguisher covers your large-scale fire protection needs. Designed for a one-man operation, this unit is easily transportable through doorways and over rough terrain and is ideal for offshore rigs, ship docks, refineries, chemical plants, aircraft ramps, remote construction sites, large laboratories, processing plants, storage and loading areas. This extinguisher is useful for combating Class B and Class C fires of flammable liquids and pressurized gas fires without conducting electricity back to the operator. Stored pressure extinguishers include the expellant and the extinguishing agent in the same cylinder with a gauge to show the amount of pressure inside the cylinder. Stored pressure, wheeled extinguishers are less expensive to purchase, as well as easier and less costly to maintain and service. This 50 lb. wheeled unit has semi-pneumatic rubber wheels, is fully charged, with the option to include an annual inspection tag.