1Applicable Models: Quick coupler tee adapter is extremely suitable for R22 R12 R134, or vacuum gauge, has high reliability and stable performance, practical in use. 2Thread Size: One end of the valve core tee adapter is a female 1/4in SAE flared FFL with a built in valve core, another two ends are 1/4in SAE male thread flare MFL. 3Durable Material: Quick coupler access tee is made of premium brass material, anti rust, wearproof, sturdy structure, high temperature resistant, not easy to break. 4Easy Operation: The quick coupler access tee is easy to operate and install, has a strong seal and is not easy to leak, durable and safe. Save your time and effort. 5High Reliability: Professional manufacturing, strictly follows the factory quality control, 1/4in valve tee adapter has high quality, good replacement part on the market.