UL certified to meet or exceed EPA regulations per ARI 740-98.
For use with all class III, IV, and V refrigerants:
R-12, R-134a, R-401c, R-406a, R-500, R-401a, R-409a, R-401b,
R-412a, R411a, R-407d, R-22, R-411b, R-502, R-407c, R-402b,
R-408a, R-509, R-407a, R-404a, R-402a, R-507, R-407B, R-410a
