The Emzone R12a A/C Cool Refrigerant Recharge is a 10-oz eco-friendly product that aids in achieving cooler vent temperatures and lower head pressure, enhancing system efficiency. It is non-ozone depleting and system safe. Note that air conditioning systems must be free of, or properly evacuated of, R134A, R12, 1234YF refrigerants by certified personnel before using this alternative product, as per environmental regulations.