134a Compatible. Don't buy expecting to open the box and go to work. does not have 134 1/2 acre by 14x1.5 metric hoses. has old style hoses that require adapters that restrict flow due to the Schrader valve depressor. does not include connector 134a. A good set of Parker connectors costs $60-70. Fakes are cheaper, in my experience they cannot be trusted. The hoses can be used with R-22 or R-404A. I don't know, I use automatic air conditioning. bought as a reserve. The warranty covers the manifold and valves only. disappointed and returned thanks to Revain. suggest you buy a full set in package as this is not the case for you
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