First Alert 20-A:120-B:C Rechargeable Commercial Grade Fire Extinguisher

20-pound rechargeable, commercial grade fire extinguisher. Suitable for high hazard industrial applications. Monoammonium phosphate dry chemical extinguishing agent is effective against wood, paper, and cloth fires plus grease, oil, gasoline, and electrical fires. Unit is rechargeable and has large easy-to-read pressure gauge. Includes metal wall hanger for mounting. Fits standard standard fire boxes.