HFC 4.90 Kg fire extinguisher 727 series 4.90 kg HFC gas extinguisher, with automatic or manual discharge, protects engine compartments, holds, machinery or electrical installations. Volume protected: 7.08 m3 Extinguishing agent: Heptafluoropropane (HFC-227) Extinguishes fire in less than 10 seconds. Non-corrosive, no residue after gas discharge. Minimal impact on the environment. Automatic activation threshold per bulb: 67°C. Complies with standards: CE, ISO 9094-1 and 9094-2, BUREAU VERITAS and RINA.