... most perfect filter core.Suitable for refrigerant: R-12, R-22, R-134a, R-404a, R-507, R-410A, R-407C ... etc DS Series80% of the molecular ... most perfect filter core.Suitable for refrigerant: R-12, R-22, R-134a, R-404a, R-507, R-410A, R-407C ... etc Type D1(in) D2(in ...