R1234YF Adapter 1/2" ACME Left Hand Female to 1/4" SAE Male #3110 | Enviro-Safe Refrigerants, Inc.
Amazon.com: R134A Brass Adapter Fitting, 1/4" Male to 1/2" Female Refrigerant Tank Adapterr with Valve Core, Fits for AC Refrigerant System : Automotive
Amazon.com: R410A Mini Split Adapters, R410a Refrigerant Hose Adapter, Brass Converter Mini Split Line Adapter Connectors kit with 5/16'' SAE Female to 1/4'' SAE Male, 1/2'' to 1/4'' Refrigerant Tank Adapters (6) :