These fire extingusihers have a compact design that provides economical fire suppression for use in vehicles, trailers, homes, boats and RVUs. All models are OSHA and UL approved. Model 4104000 class 5B:C, 2lbs of agent. Effective on electrical fires and flammable liquids. Has push button pressure check. Easy to use, compact design. Non-toxic dry chemical agent. For use in kitchen, bedroom or RV.