R404a refrigerant ,good quality competitive price long-term substitute for R502a colorless gas under ordinary temperatures, R404a refrigerant, refrigerant R404a ,mixed refrigerant,Characteristics&purposes: R404a is a colorless gas under ordinary temperatures, and a colorless&transparent liquid under the pressure of itself, mix by HFC-125, HFC-134a and HFC-143. And it's a long-term substitute for ...