Potassium bicarbonate Purple K dry chemical stored pressure fire extinguishers are designed for use on high hazard types of Class B and C fires. Purple K is generally superior to other dry chemicals on Class B fires, ideal for industrial and commercial sites where flammable liquid or gas fire risk exist. Wheeled extinguisher is designed for single person operation and can pass easily through standard doorways. Extinguisher has heavy-duty plated brass valves, steel cylinder, 25 ft. hose. UL Listed and USCG Approved, meets D.O.T. requirements.