Arctic Freeze Ultra Synthetic R134a+ Automotive Refrigerant - 12 OZ Arctic Freeze Ultra Synthetic R134a+ Automotive Refrigerant makes it easy to recharge your vehicle air conditioning system. Specially formulated with Cool Boost technology this refrigerant 134a kit delivers colder air in your vehicle. This auto refrigerant includes AC leak sealer to seal common leaks in rubber hoses gaskets and O-rings. Moisture and acid buildup eliminator in this refrigerant R-134a kit helps to extend the life of your AC system. Find the low pressure port turn on the car and turn the AC on high. Use the quick connect fitting on the refrigerant dispenser read the pressure and charge the system. This item contains R-134a.