Robinair 34414-B R1234yf AC1234-6 Vehicle A/C Capacities Database - 2021 - Confirm A/C system charge capacities directly from your Robinair AC1234-6 A/C RRR machine for R-1234yf systems. Includes charge amounts and component oil capacities for vehicle model years 2013-2020 using R-1234yf refrigerant. Compatible with the Robinair AC1234-6 AC recovery machine only. Database helps ensure the vehicle system is charged correctly with the correct amount of oil, per factory and OEM specification. This two-card set updates the AC1234-6 software to allow the use of the refrigerant database card. To gain access to the refrigerant database, users must first install the included software update card.