The Robinair 178C can recover, recycle, evacuate and recharge multiple refrigerants, all in one fast and continuous operation through one hook-up. It's ideal for mass transit vehicles, buses, refrigerated trailers or containers and other applications that use refrigerants other than R-134a and not typically found in mobile vehicle applications. Recover, recycle, evacuate and recharge R-12, R-134a, R-22, R-44A, R-47C and many other medium-pressure and high-pressure refrigerant blends