Features and Benefits: High performance refrigerant additive; Use in any R134a mobile air conditioning system; Helps extend compressor life, improve performance, reduces friction and helps lower duct temperature; Contains 2 ounces of Extreme Cold; High Performance Refrigerant Additive. Use in any R134a mobile air conditioning system. Helps extend compressor life, improve performance, reduces friction and helps lower duct temperature. Contains 2 ounces of Extreme Cold.