R12 to R134a Conversion Kit - R2
These screw-on adapters allow you to convert your AW11/SW20 R12 AC system into a more modern R134a. Both refrigerants can be used in the system, but you need to correct fittings to run the corresponding machines. Note, R12 systems running R134a will not work as efficiently as the original R12. The AC will still blow cold/dry beyond ambient air, but not AS cold as the factory setup.
While R12 is no longer for sale in most states, R134a is readily available.