Features Intelligent Control: Air Conditioning Refrigerant Safety Valve Equipped with a knurled knob, the refrigerant valve allows better control of charging, simple and efficient. Reliable working: Just turn the knob at the end, and the front part of the wire will be driven to be automatically tensioned. Higher Safety: The valve body allows free rotation, so there is no leakage through the pipe, and safety is increased. Good Material: The refrigerant adapter with sturdy structure is made of thickened brass and can withstand high pressure. Practical Application: Perfectly fits R22, R410, R134A and R404 refrigerants, very easy to install, light and small. Specification: Item Type: Refrigerant Charge Valve Material: brass Sealing method: 4-layer sealing. Applicable refrigerant: For R22, R410, R134A, R404. Thread interface: 1/4 inch to 1/4 inch. Package list: 1x refrigerant charge valve Note: Please match the appropriate model size before installation and use. Package List 1 x Refrigerant Charging Valve