Feature: 1. Premium MateriaL: The three way valve core adapter is made of high quality brass, the construction is durable and reliable, can be used for a long time. 2. Professional Structure: One end is internally threaded 1/4in SAE flared FFL with built in valve core, and the other two ends are 1/4in SAE male flared MFL. 3. Wide Application: The quick coupler access tee adapter can be connected to r22, r12, r134 and vacuum gauge with stable performance and high efficiency. 4. Good Sealing Performance: The 1/4in valve core tee connector is designed for double sealing to ensure no leakage, brass filling valve comes with sealing cap. 5. With Check Valve: The quick access tee connector is equipped with a one way check valve, which can greatly prevent media backflow and leakage, reliable in use. Specification: Item Type: 1/4in Valve Core Tee Adapter Material: Brass Application: R22, R12, R134, vacuum gauge. Package List: 1 x 1/4in Valve Core Tee Adapter1 x One Way Check Valve