1、Copper Material: This R134 quick connector body is made of premium copper, which is rust proof and corrosion resistant. Aluminum switch has high wear resistance and chemical corrosion resistance. The combination of the two makes the connector more durable and suitable for long term use. 2、Leakage Free Design: Built in O ring ensures complete sealing, providing excellent protection and preventing waste refrigerant leakage. The provided bell mouth ensures connection to a 1/4in hose or adapter, which can be disassembled for easy replacement if needed. 3、Better Control: The adjustable R134 adapter quick connector is used to control the high and low flow rates of vehicle refrigerant. This connector can be connected to the R134A repair port of the vehicle. 4、Quick Connector: Connect the 5 ball quick connect clip to the R134A port of the vehicle, sealing with an easy to grip knurled ring, and then connect the air conditioning manifold instrument cluster and refrigerant hose. Open and close the top switch to control its opening and closing. 5、Wide in Matching: The R134A adapter is suitable for the R134 repair port quick connector adapter, with a 1/4in male connector, and is compatible with most automotive air conditioning diagnostic AC manifold instrument hoses. Adjustable coupler provides universal compatibility.