ITEM NAME:R134A Shut Ball Valve Air Refrigeration Tools 1/4" For Charging Hoses.1/2" male SAE on one end and 1/4" female SAE with valve core depressor on other end. Suitable For A/C Charging Hoses HVAC 1/4" AC Refrigerant R134A Freon. Using Shut off ball valves reduces the lose of refrigerant.