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 1997-2018 using R-134a refrigerant. Compatible with legacy R-134a machines from Robinair including the 34788, 34788-H and 34988 AC recovery machines. Database helps ensure the vehicle system is charged correctly with the correct amount of oil, per factory and OEM specification.