Description of refrigerant gas cylinder: Refrigerant gas cylinder is mainly used to substitute CFC12 as refrigerant in car conditioning and refrigerating and Refrigerating in refrigerator. Refrigerant gas is used in household, industrial and commercial airconditioning systems. It can also be used as an aerosol propellant for pesticide and paint, or as a fire extinguishing agent. It is a primary feedstock for fluoropolymers.