The Snap-on Polartek Dual A/C Machine combines the work of two machines into one powerful tool for recovering, recycling and recharging vehicle A/C systems.
The EEAC334 unit handles both R134a and R1234yf refrigerants, with dedicated 30-lb. refillable tanks for each, so there is no risk of cross-contamination and no need to change tanks when switching between the two fluids.
Link: Snap-on