Certified A/C Pro Auto A/C R-134a PLUS (14 ounces), 307 Replaces lost R-134a refrigerant and oil in automotive A/C systems Will tune up, lubricate, clean and charge an A/C system Contains stop leak to help seal leakage at O-rings, gaskets and hoses, and conditions O-Rings Contains 11 oz. of R-134a, 2 oz. of Universal PAG Oil charge with O-Ring Conditioner and Stop Leak and 1 oz. of Maxi Cool Performance Booster with A/C Cleaner ACME threaded top