BRASS MATERIAL: Made from high quality brass, the flow control valve is very strong and durable. THICKENED BODY: Adopting thickened body, the brass pipe fitting is durable and has a long service life. BRITISH SYSTEM: Adopting the most widely used British system refueling hose connection, 1/4" to 5/16". EASY TO INSTALL: Install the end of the charge hose and minimize refrigerant loss during maintenance. APPLICATION: The water control valve hose connector is designed for the hose R410A refrigerant charge. Thanks to this tool, no more refrigerant is burned on your hands. Specification: Material: brass Thread: 1/4'' - 5/16'' Weight: about 101g / 3.6oz Package List: 1 x Flow Control Valve Excellent quality, solve the problem of hands hurting refrigerant coolant The movable pod can accurately control the air needle of the air conditioner high and low valves Round knob design, no matter how small the gap, can be used easily Easily add fluoride to meet various needs