**MP 39 (R-401A), an HCFC-based refrigerant from DuPont is an easy, quick, and cost-effective retrofit refrigerant for R-12 stationary positive displacement air-conditioning and refrigeration equipment such as walk-in coolers, beverage dispensers, vending machines, and supermarket rack systems. MP39 (R-401A) is approved by major compressor manufacturers and has the longest proven track record of any R-12 retrofit refrigerant. ** Easy Retrofit: Works with existing mineral oil (MO) in many unitary and close-coupled systems. Alkylbenzene (AB) oil is recommended for optimum oil return. One compressor oil change to AB will typically remove 50% to 80% of the existing MO, which satisfies the recommendations and requirements of most compressor manufacturers. *MP 39 is a Registered Trademark of DuPont **Information above obtained from "DuPont Refrigerant Products"