1、Prevent Leakage: The professional design, accurate spring lock and knurled grip loop provide excellent protection against wasteful refrigerant leakage and provide security for the use of the instrument. 2、High and Low AC Adapters: This adapter includes a pair of high and low AC adapters with an additional conversion slot adapter featuring a 1/4 inch female thread to 1/2 inch male thread connector. 3、High Compatibility: R134a adapters are compatible with most automotive air conditioning diagnostic AC manifold instrument hoses. Adjustable couplers provide universal compatibility for all models. 4、Efficiency Enhancement: Our adapters are suitable for quick connector adapters where the service port is a 1/4 inch male thread connector, allowing you to work more efficiently and with guaranteed quality work. 5、Removable Design: This adapter can be easily installed by following the normal process and can be removed when not needed, very convenient and easy to use.