This R134a Self-Sealing A/C Refrigerant Cap Valve is required to open up refrigerant flow from a refrigerant can to an A/C manifold.
This R134a Can Tap has a 1/2 in. ACME (M) thread designed for use with R134a self-sealing or reusable cans. The durable gasket ensures leak proof operation. The valve has a full grip valve knob and built-in safety check valve.