Functions: 1. Purpose: Evacuates excess air from the refrigerant metering tube. The pressure releases the excess air inside the tube, thus achieving better vacuum and fluorination results. 2. Easy Installation: Suitable for 1/4" SAE interface tools, provides excellent sealing performance and is widely used on air conditioning manifolds for R22, R12, R134 and other applications. 3. Safe and Reliable: This refrigerant charging valve features fine workmanship, is safe and reliable, and is suitable for refrigerant charging and charging. 4. Brass Material: The air valve is made of high-quality brass for high strength, durability, and wear resistance, as well as long-term use. 5. Easy Installation: Easy to install; simply attach it to the end of the charging hose to minimize refrigerant loss during maintenance. Specifications: Item Type: Refrigerant Charging Valve Material: Brass Weight: Approx. 55g/1.9oz Compatible Models: 1/4" SAE interface, compatible with R22, R12, and R134 Package Contents: 1 x Refrigerant Charging Valve 1. Easy Installation: Suitable for instruments with 1/4" SAE interface, providing excellent sealing, widely used in air conditioning manifolds for R22, R12 and R134. 2. Function: Evacuates excess air from refrigerant measuring tubes. The pressure evacuates excess air, improving vacuum and fluorination. 3. Easy Installation: Simply attach it to the end of the charging hose to minimize refrigerant loss during maintenance. 4. Brass Material: The valve is made of high-quality brass for strength, durability, wear resistance and long-term use. 5. Safe and Reliable: The refrigerant charging valve features fine workmanship, safety and reliability, ideal for charging and recharging refrigerants.