Brand: SRI Easy Operation & Refillable Capacity: 9Ltr Type:  Foam Type Body material: Cold Roll Steel Paint finish: Red Included: Wall Hook Hanger Fire Rating: 5A 21B Type of fire: A Highly Recommended for Home, Hotel, Bank, School, College, Hospital, Office etc. Warranty: 2 Years Operation of the chemical foam extinguisher is different from that of other portable extinguishers.The extinguisher is inverted, the lead seal falls, clearing the ports in the inner container and the two solutions can then freely mix. When these solution mixes, the above shown reaction takes place producing Co2 which drives the foam out with enough pressure.