This Amerex Purple K dry chemical, stored pressure, wheeled fire extinguisher covers your large-scale fire protection needs. Designed for one-man operation, this unit is easily transportable through doorways and over rough terrain. This extinguisher is designed for use on high-hazard Class B (flammable liquids and gases) and C (electrical) fires. It is ideal for use in industrial and commercial settings - like oil, gas, chemical, and utilities industries - where flammable liquids are stored. 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.