AC/R Performance Enhancer COOL-SHOT (1 fl.oz. - 30ml) - Dose for systems UP TO 4 TONS - 15 KW (1/4&5/16 SAE adapters included). It's also a universal dose for all vehicles (R12&R134 adapters included) To be used when A/C doesnt cool anymore: Up to 41F (5C) less in a very few minutes For AC/R Systems up to 15 kW (4 TONS) Compatible with all Refrigerant Gases Ideal both for Car and Home A/C Systems Safe both for the System and the Operator and Easy to Use