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Confirm A/C system charge capacities directly from your Robinair A/C RRR machine for R-134a systems. Includes charge amounts and component oil capacities for vehicle model years 1997-2020 using R-134a refrigerant. Compatible with the newest R-134a machines from Robinair including the 34288NI, 34288NI-230, 34788NI, 34788NI-H, 34788NI-230, 34988NI-230 and 34988NI AC recovery machines. Database helps ensure the vehicle system is charged correctly with the correct amount of oil, per factory and OEM specification.