... compressed oxygen mining self- rescuer coal mine self rescuer,filter self-rescuer,miners self rescuer CHINA NEWEST SELF RESCUER ... oxygen mining self- rescuer, coal mine self rescuer,filter self-rescuer,miners self rescuer ZYX45 isolated compressed oxygen ... weight (including CO2 absorbent and oxygen): 2.1kg Overall dimension: 227mmX177mmX96mmOxygen cylinder:Volume: 0.38L (liter)Rated pressure: ...