This Heavy Duty plus Fire Extinguisher is ideal for offices, homes, and workshops. It fights wood, paper, fabric, electrical, and flammable liquid fires. It is UL-Rated 3-A: 40-B: C, which exceeds minimum 2-A: 10-B: C code requirements. This fire extinguisher contains mono ammonium phosphate extinguishing agent. It features a commercial-grade metal valve and trigger with an easy-to-read pressure gauge. The metal pull pin helps prevent accidental discharge and discourages tampering. It includes a heavy duty wall mounting hook to keep it secure, or it fits easily inside a standard fire box. This extinguisher is designed for use against small fires that have just started and are small enough to fight safely. It is not designed to fight large fires that are burning out of control. If the fire is too hot or smoky for you to get within 6 ft. of it, do not try to fight it yourself. Warn everyone, evacuate the premises, and have someone call the fire department. This extinguisher contains a dry powder extinguishing agent that is nontoxic, but it can irritate your skin. When using this fire extinguisher, avoid breathing the powder and always ventilate the area after use. The First Alert Pro5 is warranted for 12-years.