Applicable: Fits A/C HVAC 1/4" AC Refrigerant R12 R22 Freon Charging Hoses. Material: Brass and Plastic. Simple and easy to use design. Durable use. Function: Quickly and easily replace leaking valve cores, remove and install valve cores without loss of refrigerant. Design: 1/4" Male SAE (R12R22) on one end and 1/4" Female SAE with valve body depressor on the other end. Package: 3pcs R12 R22 Male 1/4 SAE Straight Ball Valves for Refrigerant.