OEMTOOLS 24561 Conversion Coupler Set (R134a to HFO-1234YF), 1 Pack HFO-1234YF Manual Couplers with 14 mm Female Threads to Convert R134a Manifold and Hoses to HFO1234YF Manual Couplers with 6 Latching Balls to Provide Superior Alignment and Positive Locking Includes Tank Adapter, 1/2 In. Acme Right Hand to 1/2 In. Acme Left Hand Adapter Use with R134a Automotive Machines and Manifolds