... hour:Type 40≥40min,Type 60≥60min poison gas and smoke protectig,fireproof,hot-radiation protecting,good sealing property,suitable ... Object of protection:Cabon monxide(CO),hydrogen cyanide(HCN),Poison smoke and fog.c.Mist permeability coefficient5%,d.Inhalation resistance800pa, ... It cant be used for work protection,just for personal escape and self-life-saving.b. Storage conditions:00C-400C surroundings ...