This Amerex Purple K dry chemical, direct 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. 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. Direct pressure extinguishers feature a nitrogen cylinder with a quick opening brass valve to pressurize and to completely discharge the agent cylinder. This 125 lb. wheeled unit has 16-inch semi-pneumatic rubber wheels, is fully charged, with the option to include an annual inspection tag.