Check the listing for details. 2pcs R134A Quick Connector Adapter Coupler Auto AC Manifold Gauge Low/High HVAC. Color: Blue/Red, Condition: New. Listed at 16.99 USD. This set of high and low pressure couplers easily service For 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: Built-in O-rings ensure a complete hermetic seal, providing superior protection against wasteful refrigerant leakage; the provided flares give you sure connections to 1/4 inch HVAC hoses or adapters and are detachable for cheap and easy replacement if required LONG SERVICE LIFE: Expect years of use thanks to these R134a adapters' premium threading and materials; their aluminum and nickel-plated bronze construc.