1. 6 Independent key functions to guarantee the safety： a) Security lock b) Main valve c) Indicator d) Euromatic e) Slit opening f) silicon ring 2. The pressure cooker is tested for safeness and tightness even at incredible high pressures. (Cars tires: 1.6 - 2.5 bar; Fissler pressure cookers) 3. 3 in 1: The innovative function is to efficiently cook 3 different dishes in the same pressure cooker without flavor mixed. Until 2005, Fissler sold more than 100 million pressure cookers which never had any insecure accidents.