ABC Type Dry Chemical Fire Extinguishers Utilizes a non-toxic Monoammonium Phosphate dry chemical agent, which is highly effective against A, B and C class fires. Excel Line™ nylon-valved fire extinguishers with aluminum cylinders are best suited for light commercial applications. Pro-Line™ extinguishers feature metal valves and steel cylinders, making them suitable for standard industrial applications. For heavy industrial applications, call on Extra Line™, also featuring metal valves and steel cylinders. Sold individually.