CO2 fire extinguisher usually can be used to put out the fires from books, oil, archives, expensive equipment and precision instrument which working below 600 v electrical equipment. Being apply to the fire of class B from oil products. They are also used to go out to class A . But except for inflammable liquid, water-soluble flammable and charged equipment. And they can be supplied with PED certificate approved by TUV. The material is 34CrMo4.The capacity ranges from 1.3kg to 6kg. The work pressure and test pressure can reach 174bar and 250bar under 20°C. Also, we'd like to supply another group of pressures 216bar and 315bar under 20°C.