*High-Quality Brass Material: HVAC air conditioner safety valve is made of high-quality brass, which is strong, and corrosion-resistant. Adapt to harsh environments and have long service life. *Powerful performance: Shut off safety valve prevents air conditioning cryogen from freezing your hands and lasts for long periods of time, even in extreme conditions. It has a seal to prevent leaks. *Safe and Reliable: Our air conditioning adapter undergoes strict quality control. It is sealed to ensure a leak-free, safe and secure connection. *Wide Range of Applications: Our brass control valves are available with R410a connections for connecting to charge hoses and drain lines to pressure regulator tubes. can be used in maintenance, service evaporation, or charging on most R410a refrigerant air conditioning. HVAC safety valve Material: brass Fitting size: male 1/4? , female 5/16? Quantity: 1pc Product use: R410A Purpose use: Suitable for charging service to home commercial air conditioners mini split