Restrain from using these products! It may work for a season or two if lucky but will damage your a/c due to several issues, one of which is high pressure, despite a little gauge it comes equipped with.
Properly applied refrigerant must be into a vacuum created by an evac pump that these kits do not offer, resulting in added charge over and above the ambient pressure also leaving moisture (air humidity) behind thereby creating an acidic environment that further corrodes pipes, expansion valves, condenser, compressor, leading to catastrophic a/c failure$. Most of these cans also contain propane-based chemicals rather than true refrigerants.
