Check the listing for details. Adjustable AC Quick Coupler Connector Adapter High Low Side 1/4" SAE HVAC. Condition: New. Listed at 9.49 USD. R134a QC 2 PACK: This set of high and low pressure couplers from Orion Motor Tech will let you quickly and easily service the R134a AC systems in both foreign and domestic cars, trucks, SUVs, and other vehicles EASY OPERATION: These 5 and 6-ball quick couplers snap down onto R134 coolant ports, sealing with easy-grip knurled rings and opening valves using their top control knobs; closure and disconnection is just as fast and simple LEAK-FREE SEAL: Built-in O-rings create a complete hermetic seal, significantly reducing the risk of refrigerant leakage and ensuring efficient operation while protecting environment SECURE CONNECTION: Included flares provide reliable connections to 1/4" HVAC hoses or adapters, with the benefit of being easily detachable for straightforward replacement.