8 oz cans Our customers asked for it and we listened! For automotive and other 134a applications. Works for standard small A/C units as well. Because Enviro-Safe 134a Replacement Refrigerant with Stop Leak, you will use up to 60% less! One 8 ounce can is equivalent to 21+ ounces of 134a. Flammable to open flame or spark. Proceed with caution if used in systems designed for non-flammable refrigerants.